Finding the Fourth Proportional to 10,718.88, 16,078.17 and 10,454.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,718.88 : 16,078.17 = 10,454.16 : x
2. Step 2: Convert to fraction form
   10,718.88/16,078.17 = 10,454.16/x
3. Step 3: Cross multiply
   10,718.88x = 16,078.17 × 10,454.16
4. Step 4: Simplify right side
   10,718.88x = 168,083,761.69
5. Step 5: Solve for x
   x = 168,083,761.69/10,718.88
6. Step 6: Final answer
   x = 15,681.09