Finding the Fourth Proportional to 112,640.50, 155,443.50 and 60,957.50

Step by Step Solution

1. Step 1: Write the proportion equation
   112,640.50 : 155,443.50 = 60,957.50 : x
2. Step 2: Convert to fraction form
   112,640.50/155,443.50 = 60,957.50/x
3. Step 3: Cross multiply
   112,640.50x = 155,443.50 × 60,957.50
4. Step 4: Simplify right side
   112,640.50x = 9,475,447,179.82
5. Step 5: Solve for x
   x = 9,475,447,179.82/112,640.50
6. Step 6: Final answer
   x = 84,121.14