Step 1:
The first step to converting 7478.918880219 to a fraction is to re-write 7478.918880219 in the form p/q where p and q are both positive integers. To start with, 7478.918880219 can be written as simply 7478.918880219/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 7478.918880219, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 7478.918880219/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 7478.918880219/1 each by 1000000000:
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 7478.918880219 as a fraction:
89747/12 / 1