Step 1:
The first step to converting 3261.8999428133 to a fraction is to re-write 3261.8999428133 in the form p/q where p and q are both positive integers. To start with, 3261.8999428133 can be written as simply 3261.8999428133/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 3261.8999428133, which in this case is 10. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 3261.8999428133/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 3261.8999428133/1 each by 10000000000:
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 3261.8999428133 as a fraction:
32619/10 / 1