Finding the Fourth Proportional to 12,688.56, 17,505.96 and 7,382.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,688.56 : 17,505.96 = 7,382.24 : x
2. Step 2: Convert to fraction form
   12,688.56/17,505.96 = 7,382.24/x
3. Step 3: Cross multiply
   12,688.56x = 17,505.96 × 7,382.24
4. Step 4: Simplify right side
   12,688.56x = 129,233,198.15
5. Step 5: Solve for x
   x = 129,233,198.15/12,688.56
6. Step 6: Final answer
   x = 10,185.02