Finding the Fourth Proportional to 102,900.57, 141,957.73 and 60,439.96

Step by Step Solution

1. Step 1: Write the proportion equation
   102,900.57 : 141,957.73 = 60,439.96 : x
2. Step 2: Convert to fraction form
   102,900.57/141,957.73 = 60,439.96/x
3. Step 3: Cross multiply
   102,900.57x = 141,957.73 × 60,439.96
4. Step 4: Simplify right side
   102,900.57x = 8,579,919,522.89
5. Step 5: Solve for x
   x = 8,579,919,522.89/102,900.57
6. Step 6: Final answer
   x = 83,380.68