Finding the Fourth Proportional to 72,116.42, 99,520.42 and 39,850.14

Step by Step Solution

1. Step 1: Write the proportion equation
   72,116.42 : 99,520.42 = 39,850.14 : x
2. Step 2: Convert to fraction form
   72,116.42/99,520.42 = 39,850.14/x
3. Step 3: Cross multiply
   72,116.42x = 99,520.42 × 39,850.14
4. Step 4: Simplify right side
   72,116.42x = 3,965,902,470.61
5. Step 5: Solve for x
   x = 3,965,902,470.61/72,116.42
6. Step 6: Final answer
   x = 54,993.06