Finding the Fourth Proportional to 10,660.88, 14,713.40 and 7,686.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,660.88 : 14,713.40 = 7,686.56 : x
2. Step 2: Convert to fraction form
   10,660.88/14,713.40 = 7,686.56/x
3. Step 3: Cross multiply
   10,660.88x = 14,713.40 × 7,686.56
4. Step 4: Simplify right side
   10,660.88x = 113,095,431.90
5. Step 5: Solve for x
   x = 113,095,431.90/10,660.88
6. Step 6: Final answer
   x = 10,608.45