Finding the Fourth Proportional to 9,078.52, 12,529.42 and 5,099.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,078.52 : 12,529.42 = 5,099.61 : x
2. Step 2: Convert to fraction form
   9,078.52/12,529.42 = 5,099.61/x
3. Step 3: Cross multiply
   9,078.52x = 12,529.42 × 5,099.61
4. Step 4: Simplify right side
   9,078.52x = 63,895,155.53
5. Step 5: Solve for x
   x = 63,895,155.53/9,078.52
6. Step 6: Final answer
   x = 7,038.06