Finding the Fourth Proportional to 10,431.41, 14,395.40 and 5,715.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,431.41 : 14,395.40 = 5,715.86 : x
2. Step 2: Convert to fraction form
   10,431.41/14,395.40 = 5,715.86/x
3. Step 3: Cross multiply
   10,431.41x = 14,395.40 × 5,715.86
4. Step 4: Simplify right side
   10,431.41x = 82,281,990.49
5. Step 5: Solve for x
   x = 82,281,990.49/10,431.41
6. Step 6: Final answer
   x = 7,887.91