Finding the Fourth Proportional to 9,008.31, 12,429.48 and 5,229.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,008.31 : 12,429.48 = 5,229.29 : x
2. Step 2: Convert to fraction form
   9,008.31/12,429.48 = 5,229.29/x
3. Step 3: Cross multiply
   9,008.31x = 12,429.48 × 5,229.29
4. Step 4: Simplify right side
   9,008.31x = 64,997,406.15
5. Step 5: Solve for x
   x = 64,997,406.15/9,008.31
6. Step 6: Final answer
   x = 7,215.27