Step 1:
The first step to converting 21764.558810591 to a fraction is to re-write 21764.558810591 in the form p/q where p and q are both positive integers. To start with, 21764.558810591 can be written as simply 21764.558810591/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 21764.558810591, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 21764.558810591/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 21764.558810591/1 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 21764.558810591 as a fraction:
152352/7 / 1