Finding the Fourth Proportional to 87,432.18, 120,656.25 and 49,191.77

Step by Step Solution

1. Step 1: Write the proportion equation
   87,432.18 : 120,656.25 = 49,191.77 : x
2. Step 2: Convert to fraction form
   87,432.18/120,656.25 = 49,191.77/x
3. Step 3: Cross multiply
   87,432.18x = 120,656.25 × 49,191.77
4. Step 4: Simplify right side
   87,432.18x = 5,935,293,895.78
5. Step 5: Solve for x
   x = 5,935,293,895.78/87,432.18
6. Step 6: Final answer
   x = 67,884.55