Finding the Fourth Proportional to 85,216.66, 117,811.56 and 63,959.02

Step by Step Solution

1. Step 1: Write the proportion equation
   85,216.66 : 117,811.56 = 63,959.02 : x
2. Step 2: Convert to fraction form
   85,216.66/117,811.56 = 63,959.02/x
3. Step 3: Cross multiply
   85,216.66x = 117,811.56 × 63,959.02
4. Step 4: Simplify right side
   85,216.66x = 7,535,111,867.59
5. Step 5: Solve for x
   x = 7,535,111,867.59/85,216.66
6. Step 6: Final answer
   x = 88,422.99