Finding the Fourth Proportional to 12,380.28, 17,085.15 and 7,663.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,380.28 : 17,085.15 = 7,663.62 : x
2. Step 2: Convert to fraction form
   12,380.28/17,085.15 = 7,663.62/x
3. Step 3: Cross multiply
   12,380.28x = 17,085.15 × 7,663.62
4. Step 4: Simplify right side
   12,380.28x = 130,934,097.24
5. Step 5: Solve for x
   x = 130,934,097.24/12,380.28
6. Step 6: Final answer
   x = 10,576.02