Finding the Fourth Proportional to 14,115.31, 21,155.88 and 7,868.69

Step by Step Solution

1. Step 1: Write the proportion equation
   14,115.31 : 21,155.88 = 7,868.69 : x
2. Step 2: Convert to fraction form
   14,115.31/21,155.88 = 7,868.69/x
3. Step 3: Cross multiply
   14,115.31x = 21,155.88 × 7,868.69
4. Step 4: Simplify right side
   14,115.31x = 166,469,183.46
5. Step 5: Solve for x
   x = 166,469,183.46/14,115.31
6. Step 6: Final answer
   x = 11,793.52