Finding the Fourth Proportional to 87,156.72, 120,282.12 and 49,433.40

Step by Step Solution

1. Step 1: Write the proportion equation
   87,156.72 : 120,282.12 = 49,433.40 : x
2. Step 2: Convert to fraction form
   87,156.72/120,282.12 = 49,433.40/x
3. Step 3: Cross multiply
   87,156.72x = 120,282.12 × 49,433.40
4. Step 4: Simplify right side
   87,156.72x = 5,945,954,150.81
5. Step 5: Solve for x
   x = 5,945,954,150.81/87,156.72
6. Step 6: Final answer
   x = 68,221.41