Step 1:
The first step to converting 8729.212173361 to a fraction is to re-write 8729.212173361 in the form p/q where p and q are both positive integers. To start with, 8729.212173361 can be written as simply 8729.212173361/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 8729.212173361, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 8729.212173361/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 8729.212173361/1 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 8729.212173361 as a fraction:
122209/14 / 1