Finding the Fourth Proportional to 10,431.55, 14,395.35 and 5,715.73

Step by Step Solution

1. Step 1: Write the proportion equation
   10,431.55 : 14,395.35 = 5,715.73 : x
2. Step 2: Convert to fraction form
   10,431.55/14,395.35 = 5,715.73/x
3. Step 3: Cross multiply
   10,431.55x = 14,395.35 × 5,715.73
4. Step 4: Simplify right side
   10,431.55x = 82,279,933.86
5. Step 5: Solve for x
   x = 82,279,933.86/10,431.55
6. Step 6: Final answer
   x = 7,887.60