Finding the Fourth Proportional to 112,429.50, 155,153.12 and 62,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   112,429.50 : 155,153.12 = 62,128.50 : x
2. Step 2: Convert to fraction form
   112,429.50/155,153.12 = 62,128.50/x
3. Step 3: Cross multiply
   112,429.50x = 155,153.12 × 62,128.50
4. Step 4: Simplify right side
   112,429.50x = 9,639,430,305.28
5. Step 5: Solve for x
   x = 9,639,430,305.28/112,429.50
6. Step 6: Final answer
   x = 85,737.55