Finding the Fourth Proportional to 10,381.17, 15,571.25 and 5,710.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,381.17 : 15,571.25 = 5,710.31 : x
2. Step 2: Convert to fraction form
   10,381.17/15,571.25 = 5,710.31/x
3. Step 3: Cross multiply
   10,381.17x = 15,571.25 × 5,710.31
4. Step 4: Simplify right side
   10,381.17x = 88,916,664.59
5. Step 5: Solve for x
   x = 88,916,664.59/10,381.17
6. Step 6: Final answer
   x = 8,565.19