Finding the Fourth Proportional to 72,200.41, 99,640.06 and 39,934.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72,200.41 : 99,640.06 = 39,934.89 : x
2. Step 2: Convert to fraction form
   72,200.41/99,640.06 = 39,934.89/x
3. Step 3: Cross multiply
   72,200.41x = 99,640.06 × 39,934.89
4. Step 4: Simplify right side
   72,200.41x = 3,979,114,735.86
5. Step 5: Solve for x
   x = 3,979,114,735.86/72,200.41
6. Step 6: Final answer
   x = 55,112.08