Step 1:
The first step to converting 212678.5098469 to a fraction is to re-write 212678.5098469 in the form p/q where p and q are both positive integers. To start with, 212678.5098469 can be written as simply 212678.5098469/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 212678.5098469, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 212678.5098469/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 212678.5098469/1 each by 10000000:
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 212678.5098469 as a fraction:
425357/2 / 1