Finding the Fourth Proportional to 100,956.38, 139,311.50 and 57,949.02

Step by Step Solution

1. Step 1: Write the proportion equation
   100,956.38 : 139,311.50 = 57,949.02 : x
2. Step 2: Convert to fraction form
   100,956.38/139,311.50 = 57,949.02/x
3. Step 3: Cross multiply
   100,956.38x = 139,311.50 × 57,949.02
4. Step 4: Simplify right side
   100,956.38x = 8,072,964,609.98
5. Step 5: Solve for x
   x = 8,072,964,609.98/100,956.38
6. Step 6: Final answer
   x = 79,964.88