Finding the Fourth Proportional to 8,456.17, 12,683.94 and 2,612.77

Step by Step Solution

1. Step 1: Write the proportion equation
   8,456.17 : 12,683.94 = 2,612.77 : x
2. Step 2: Convert to fraction form
   8,456.17/12,683.94 = 2,612.77/x
3. Step 3: Cross multiply
   8,456.17x = 12,683.94 × 2,612.77
4. Step 4: Simplify right side
   8,456.17x = 33,140,217.91
5. Step 5: Solve for x
   x = 33,140,217.91/8,456.17
6. Step 6: Final answer
   x = 3,919.06