Finding the Fourth Proportional to 87,136.76, 120,285.48 and 58,880.72

Step by Step Solution

1. Step 1: Write the proportion equation
   87,136.76 : 120,285.48 = 58,880.72 : x
2. Step 2: Convert to fraction form
   87,136.76/120,285.48 = 58,880.72/x
3. Step 3: Cross multiply
   87,136.76x = 120,285.48 × 58,880.72
4. Step 4: Simplify right side
   87,136.76x = 7,082,495,667.95
5. Step 5: Solve for x
   x = 7,082,495,667.95/87,136.76
6. Step 6: Final answer
   x = 81,280.23