Finding the Fourth Proportional to 72,650.57, 109,139.90 and 43,087.79

Step by Step Solution

1. Step 1: Write the proportion equation
   72,650.57 : 109,139.90 = 43,087.79 : x
2. Step 2: Convert to fraction form
   72,650.57/109,139.90 = 43,087.79/x
3. Step 3: Cross multiply
   72,650.57x = 109,139.90 × 43,087.79
4. Step 4: Simplify right side
   72,650.57x = 4,702,597,149.23
5. Step 5: Solve for x
   x = 4,702,597,149.23/72,650.57
6. Step 6: Final answer
   x = 64,728.98