Finding the Fourth Proportional to 8,500.86, 12,730.76 and 5,113.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,500.86 : 12,730.76 = 5,113.91 : x
2. Step 2: Convert to fraction form
   8,500.86/12,730.76 = 5,113.91/x
3. Step 3: Cross multiply
   8,500.86x = 12,730.76 × 5,113.91
4. Step 4: Simplify right side
   8,500.86x = 65,103,960.87
5. Step 5: Solve for x
   x = 65,103,960.87/8,500.86
6. Step 6: Final answer
   x = 7,658.51