Finding the Fourth Proportional to 87,678.52, 120,989.96 and 49,436.10

Step by Step Solution

1. Step 1: Write the proportion equation
   87,678.52 : 120,989.96 = 49,436.10 : x
2. Step 2: Convert to fraction form
   87,678.52/120,989.96 = 49,436.10/x
3. Step 3: Cross multiply
   87,678.52x = 120,989.96 × 49,436.10
4. Step 4: Simplify right side
   87,678.52x = 5,981,271,280.20
5. Step 5: Solve for x
   x = 5,981,271,280.20/87,678.52
6. Step 6: Final answer
   x = 68,218.21