Finding the Fourth Proportional to 10,141.20, 15,216.17 and 5,455.71

Step by Step Solution

1. Step 1: Write the proportion equation
   10,141.20 : 15,216.17 = 5,455.71 : x
2. Step 2: Convert to fraction form
   10,141.20/15,216.17 = 5,455.71/x
3. Step 3: Cross multiply
   10,141.20x = 15,216.17 × 5,455.71
4. Step 4: Simplify right side
   10,141.20x = 83,014,983.55
5. Step 5: Solve for x
   x = 83,014,983.55/10,141.20
6. Step 6: Final answer
   x = 8,185.91