Finding the Fourth Proportional to 12,374.50, 17,079.54 and 9,680.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,374.50 : 17,079.54 = 9,680.38 : x
2. Step 2: Convert to fraction form
   12,374.50/17,079.54 = 9,680.38/x
3. Step 3: Cross multiply
   12,374.50x = 17,079.54 × 9,680.38
4. Step 4: Simplify right side
   12,374.50x = 165,336,437.43
5. Step 5: Solve for x
   x = 165,336,437.43/12,374.50
6. Step 6: Final answer
   x = 13,361.06