Lighting for a house cannot be designed by mathematical formulas. Doing as internet google searches advise of taking [fc x sf], throwing in a lumen conversion, and you wind up misled and mis-applying the basics. Even sidestepping your calculation errors, your numbers are a perfect example of why you cannot follow these methods. You will need bottled sun and have to wear sunglasses in your house if you continue this path.

Take for example your kitchen island of 4'x7' = 28sf. If you want 45fc, that equals 13,500 lumens, or about 12 large, bright 6" recessed cans. How are you going to fit 12 cans over a 4'x7' footprint? Does that sound reasonable? Do you have experience being in a room and have a sense of what works with lighting? Do you notice that the far corner with nothing in it is not "lit" as bright as where you want to read your book? That your dining chair seat does not have to be as "lit" as the center of the table top?

You have to understand that talking about fc, lumen, or lux is a theoretical measurement of the consistent spread of light on a defined size of surface. Well, that surface has it's own specific location, it's own characteristics (e.g. reflectivity or physical density around other things), and probably is not concerned with having an exact even distribution of light across it's footprint. And, remember, a light source throws it's light in a wide range of directions, where the light will be more intense at a certain point than others. Don't forget that you will usually have light throws from multiple fixtures overlapping as well.

In a kitchen, there is a high variation in the type of actions performed. You can range from 10fc for circulation to 50fc for prepping. You cannot just compartmentalize each function (counter vs floor vs island) and light them individually within the same room.

My suggestion is to throw out all you've read about calculations, and start as if you know nothing. Go to this website - David Warfel - Language of Light - to get a feel for what lighting is, what it does, and how it can improve on your life. This website has some really good visual illustrations, which is why I recommend it to people.