Finding the Fourth Proportional to 87,372.72, 120,570.78 and 49,131.18

Step by Step Solution

1. Step 1: Write the proportion equation
   87,372.72 : 120,570.78 = 49,131.18 : x
2. Step 2: Convert to fraction form
   87,372.72/120,570.78 = 49,131.18/x
3. Step 3: Cross multiply
   87,372.72x = 120,570.78 × 49,131.18
4. Step 4: Simplify right side
   87,372.72x = 5,923,784,694.92
5. Step 5: Solve for x
   x = 5,923,784,694.92/87,372.72
6. Step 6: Final answer
   x = 67,799.02