Finding the Fourth Proportional to 287,896.68, 431,976.24 and 147,753.72

Step by Step Solution

1. Step 1: Write the proportion equation
   287,896.68 : 431,976.24 = 147,753.72 : x
2. Step 2: Convert to fraction form
   287,896.68/431,976.24 = 147,753.72/x
3. Step 3: Cross multiply
   287,896.68x = 431,976.24 × 147,753.72
4. Step 4: Simplify right side
   287,896.68x = 63,826,096,411.61
5. Step 5: Solve for x
   x = 63,826,096,411.61/287,896.68
6. Step 6: Final answer
   x = 221,697.92