Step 1:
The first step to converting 19420.8611878 to a fraction is to re-write 19420.8611878 in the form p/q where p and q are both positive integers. To start with, 19420.8611878 can be written as simply 19420.8611878/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 19420.8611878, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 19420.8611878/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 19420.8611878/1 each by 10000000:
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 19420.8611878 as a fraction:
135946/7 / 1