Finding the Fourth Proportional to 64,295.28, 88,896.72 and 56,314.55

Step by Step Solution

1. Step 1: Write the proportion equation
   64,295.28 : 88,896.72 = 56,314.55 : x
2. Step 2: Convert to fraction form
   64,295.28/88,896.72 = 56,314.55/x
3. Step 3: Cross multiply
   64,295.28x = 88,896.72 × 56,314.55
4. Step 4: Simplify right side
   64,295.28x = 5,006,179,216.70
5. Step 5: Solve for x
   x = 5,006,179,216.70/64,295.28
6. Step 6: Final answer
   x = 77,862.31