Finding the Fourth Proportional to 10,431.32, 14,395.12 and 5,715.77

Step by Step Solution

1. Step 1: Write the proportion equation
   10,431.32 : 14,395.12 = 5,715.77 : x
2. Step 2: Convert to fraction form
   10,431.32/14,395.12 = 5,715.77/x
3. Step 3: Cross multiply
   10,431.32x = 14,395.12 × 5,715.77
4. Step 4: Simplify right side
   10,431.32x = 82,279,108.78
5. Step 5: Solve for x
   x = 82,279,108.78/10,431.32
6. Step 6: Final answer
   x = 7,887.70