Step 1:
The first step to converting 19589.476689408 to a fraction is to re-write 19589.476689408 in the form p/q where p and q are both positive integers. To start with, 19589.476689408 can be written as simply 19589.476689408/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 19589.476689408, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 19589.476689408/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 19589.476689408/1 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 19589.476689408 as a fraction:
411379/21 / 1