Step 1:
The first step to converting 11278.9388559 to a fraction is to re-write 11278.9388559 in the form p/q where p and q are both positive integers. To start with, 11278.9388559 can be written as simply 11278.9388559/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 11278.9388559, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 11278.9388559/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 11278.9388559/1 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 11278.9388559 as a fraction:
180463/16 / 1