Any number that you can write down on paper that's between 4 and 5
is a correct answer. There are an infinite number of them.
A few attractive ones are . . .
... 4.000000001
... 4.1
... 4.3
... 4.7
... 4.71
... 4.7100001
... 4.9
... 4.90000001
... 4.90000002
... 4.99999901
... 4.99999902
... 4.999999020000000001
.
.
etc.
