Finding the Fourth Proportional to 9,039.78, 12,474.12 and 5,502.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,039.78 : 12,474.12 = 5,502.30 : x
2. Step 2: Convert to fraction form
   9,039.78/12,474.12 = 5,502.30/x
3. Step 3: Cross multiply
   9,039.78x = 12,474.12 × 5,502.30
4. Step 4: Simplify right side
   9,039.78x = 68,636,350.48
5. Step 5: Solve for x
   x = 68,636,350.48/9,039.78
6. Step 6: Final answer
   x = 7,592.70