Finding the Fourth Proportional to 64,385.28, 88,802.96 and 56,413.71

Step by Step Solution

1. Step 1: Write the proportion equation
   64,385.28 : 88,802.96 = 56,413.71 : x
2. Step 2: Convert to fraction form
   64,385.28/88,802.96 = 56,413.71/x
3. Step 3: Cross multiply
   64,385.28x = 88,802.96 × 56,413.71
4. Step 4: Simplify right side
   64,385.28x = 5,009,704,150.51
5. Step 5: Solve for x
   x = 5,009,704,150.51/64,385.28
6. Step 6: Final answer
   x = 77,808.22