Step 1:
The first step to converting 12261.128952723 to a fraction is to re-write 12261.128952723 in the form p/q where p and q are both positive integers. To start with, 12261.128952723 can be written as simply 12261.128952723/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 12261.128952723, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 12261.128952723/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 12261.128952723/1 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 12261.128952723 as a fraction:
98089/8 / 1