Finding the Fourth Proportional to 87,411.31, 120,624.63 and 49,171.60

Step by Step Solution

1. Step 1: Write the proportion equation
   87,411.31 : 120,624.63 = 49,171.60 : x
2. Step 2: Convert to fraction form
   87,411.31/120,624.63 = 49,171.60/x
3. Step 3: Cross multiply
   87,411.31x = 120,624.63 × 49,171.60
4. Step 4: Simplify right side
   87,411.31x = 5,931,306,056.51
5. Step 5: Solve for x
   x = 5,931,306,056.51/87,411.31
6. Step 6: Final answer
   x = 67,855.13