Finding the Fourth Proportional to 9,324.38, 12,864.72 and 5,290.53

Step by Step Solution

1. Step 1: Write the proportion equation
   9,324.38 : 12,864.72 = 5,290.53 : x
2. Step 2: Convert to fraction form
   9,324.38/12,864.72 = 5,290.53/x
3. Step 3: Cross multiply
   9,324.38x = 12,864.72 × 5,290.53
4. Step 4: Simplify right side
   9,324.38x = 68,061,187.10
5. Step 5: Solve for x
   x = 68,061,187.10/9,324.38
6. Step 6: Final answer
   x = 7,299.28