Finding the Fourth Proportional to 8,626.50, 12,876.81 and 7,401.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,626.50 : 12,876.81 = 7,401.78 : x
2. Step 2: Convert to fraction form
   8,626.50/12,876.81 = 7,401.78/x
3. Step 3: Cross multiply
   8,626.50x = 12,876.81 × 7,401.78
4. Step 4: Simplify right side
   8,626.50x = 95,311,314.72
5. Step 5: Solve for x
   x = 95,311,314.72/8,626.50
6. Step 6: Final answer
   x = 11,048.67