Finding the Fourth Proportional to 10,463.31, 15,660.95 and 7,689.33

Step by Step Solution

1. Step 1: Write the proportion equation
   10,463.31 : 15,660.95 = 7,689.33 : x
2. Step 2: Convert to fraction form
   10,463.31/15,660.95 = 7,689.33/x
3. Step 3: Cross multiply
   10,463.31x = 15,660.95 × 7,689.33
4. Step 4: Simplify right side
   10,463.31x = 120,422,174.22
5. Step 5: Solve for x
   x = 120,422,174.22/10,463.31
6. Step 6: Final answer
   x = 11,508.99