Finding the Fourth Proportional to 8,401.80, 12,516.48 and 8,022.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,401.80 : 12,516.48 = 8,022.72 : x
2. Step 2: Convert to fraction form
   8,401.80/12,516.48 = 8,022.72/x
3. Step 3: Cross multiply
   8,401.80x = 12,516.48 × 8,022.72
4. Step 4: Simplify right side
   8,401.80x = 100,416,214.43
5. Step 5: Solve for x
   x = 100,416,214.43/8,401.80
6. Step 6: Final answer
   x = 11,951.75