Finding the Fourth Proportional to 17,639.85, 24,341.71 and 9,680.79

Step by Step Solution

1. Step 1: Write the proportion equation
   17,639.85 : 24,341.71 = 9,680.79 : x
2. Step 2: Convert to fraction form
   17,639.85/24,341.71 = 9,680.79/x
3. Step 3: Cross multiply
   17,639.85x = 24,341.71 × 9,680.79
4. Step 4: Simplify right side
   17,639.85x = 235,646,982.75
5. Step 5: Solve for x
   x = 235,646,982.75/17,639.85
6. Step 6: Final answer
   x = 13,358.79