Step 1:
The first step to converting 17518.436899421 to a fraction is to re-write 17518.436899421 in the form p/q where p and q are both positive integers. To start with, 17518.436899421 can be written as simply 17518.436899421/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 17518.436899421, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 17518.436899421/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 17518.436899421/1 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 17518.436899421 as a fraction:
122629/7 / 1