Finding the Fourth Proportional to 8,404.92, 12,601.17 and 2,856.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,404.92 : 12,601.17 = 2,856.78 : x
2. Step 2: Convert to fraction form
   8,404.92/12,601.17 = 2,856.78/x
3. Step 3: Cross multiply
   8,404.92x = 12,601.17 × 2,856.78
4. Step 4: Simplify right side
   8,404.92x = 35,998,770.43
5. Step 5: Solve for x
   x = 35,998,770.43/8,404.92
6. Step 6: Final answer
   x = 4,283.06