Finding the Fourth Proportional to 8,499.29, 12,730.45 and 4,107.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499.29 : 12,730.45 = 4,107.50 : x
2. Step 2: Convert to fraction form
   8,499.29/12,730.45 = 4,107.50/x
3. Step 3: Cross multiply
   8,499.29x = 12,730.45 × 4,107.50
4. Step 4: Simplify right side
   8,499.29x = 52,290,323.38
5. Step 5: Solve for x
   x = 52,290,323.38/8,499.29
6. Step 6: Final answer
   x = 6,152.32