Step 1:
The first step to converting 11711.876406431 to a fraction is to re-write 11711.876406431 in the form p/q where p and q are both positive integers. To start with, 11711.876406431 can be written as simply 11711.876406431/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 11711.876406431, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 11711.876406431/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 11711.876406431/1 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 11711.876406431 as a fraction:
93695/8 / 1