Step 1:
The first step to converting 19587.763992478 to a fraction is to re-write 19587.763992478 in the form p/q where p and q are both positive integers. To start with, 19587.763992478 can be written as simply 19587.763992478/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 19587.763992478, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 19587.763992478/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 19587.763992478/1 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 19587.763992478 as a fraction:
78351/4 / 1