Need A Little help Please

Correct me if I am wrong here. I crunched numbers and came up with the OP is crossing the line at 5420 RPM......I know that does not seem right
I got there like this:

one rev of the tire is 7.33 ft
99 mph is equal to 8712 ft per min

8712 divided by 7.33 equals 1188.63 rev per min of the tire
1188.63 times 4.56 equals 5420 rpm of the engine

don't seem right.......