Step 1:
The first step to converting 18173.755409318 to a fraction is to re-write 18173.755409318 in the form p/q where p and q are both positive integers. To start with, 18173.755409318 can be written as simply 18173.755409318/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 18173.755409318, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 18173.755409318/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 18173.755409318/1 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 18173.755409318 as a fraction:
72695/4 / 1