Step 1:
The first step to converting 19109905.421428 to a fraction is to re-write 19109905.421428 in the form p/q where p and q are both positive integers. To start with, 19109905.421428 can be written as simply 19109905.421428/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 19109905.421428, which in this case is 6. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 19109905.421428/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 19109905.421428/1 each by 1000000:
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 19109905.421428 as a fraction:
19109905/1 / 1