Finding the Fourth Proportional to 87,411.40, 120,638.41 and 49,172.56

Step by Step Solution

1. Step 1: Write the proportion equation
   87,411.40 : 120,638.41 = 49,172.56 : x
2. Step 2: Convert to fraction form
   87,411.40/120,638.41 = 49,172.56/x
3. Step 3: Cross multiply
   87,411.40x = 120,638.41 × 49,172.56
4. Step 4: Simplify right side
   87,411.40x = 5,932,099,454.03
5. Step 5: Solve for x
   x = 5,932,099,454.03/87,411.40
6. Step 6: Final answer
   x = 67,864.14