Finding the Fourth Proportional to 12,443.55, 17,171.76 and 6,778.41

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.55 : 17,171.76 = 6,778.41 : x
2. Step 2: Convert to fraction form
   12,443.55/17,171.76 = 6,778.41/x
3. Step 3: Cross multiply
   12,443.55x = 17,171.76 × 6,778.41
4. Step 4: Simplify right side
   12,443.55x = 116,397,229.70
5. Step 5: Solve for x
   x = 116,397,229.70/12,443.55
6. Step 6: Final answer
   x = 9,354.02