Finding the Fourth Proportional to 10,431.53, 14,395.17 and 5,715.71

Step by Step Solution

1. Step 1: Write the proportion equation
   10,431.53 : 14,395.17 = 5,715.71 : x
2. Step 2: Convert to fraction form
   10,431.53/14,395.17 = 5,715.71/x
3. Step 3: Cross multiply
   10,431.53x = 14,395.17 × 5,715.71
4. Step 4: Simplify right side
   10,431.53x = 82,278,516.57
5. Step 5: Solve for x
   x = 82,278,516.57/10,431.53
6. Step 6: Final answer
   x = 7,887.49