Finding the Fourth Proportional to 9,007.65, 12,429.81 and 5,229.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,007.65 : 12,429.81 = 5,229.60 : x
2. Step 2: Convert to fraction form
   9,007.65/12,429.81 = 5,229.60/x
3. Step 3: Cross multiply
   9,007.65x = 12,429.81 × 5,229.60
4. Step 4: Simplify right side
   9,007.65x = 65,002,934.38
5. Step 5: Solve for x
   x = 65,002,934.38/9,007.65
6. Step 6: Final answer
   x = 7,216.41