Step 1:
The first step to converting 7764.578987807 to a fraction is to re-write 7764.578987807 in the form p/q where p and q are both positive integers. To start with, 7764.578987807 can be written as simply 7764.578987807/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 7764.578987807, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 7764.578987807/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 7764.578987807/1 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 7764.578987807 as a fraction:
54352/7 / 1