Step 1:
The first step to converting 9209.578721599 to a fraction is to re-write 9209.578721599 in the form p/q where p and q are both positive integers. To start with, 9209.578721599 can be written as simply 9209.578721599/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 9209.578721599, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 9209.578721599/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 9209.578721599/1 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 9209.578721599 as a fraction:
64467/7 / 1