Step 1:
The first step to converting 4188868590.7628 to a fraction is to re-write 4188868590.7628 in the form p/q where p and q are both positive integers. To start with, 4188868590.7628 can be written as simply 4188868590.7628/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 4188868590.7628, which in this case is 4. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 4188868590.7628/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 4188868590.7628/1 each by 10000:
Step 3:
Now the last step is to simplify the fraction (if possible) by finding similar factors and cancelling them out, which leads to the following answer for 4188868590.7628 as a fraction:
4188868590/1 / 1