Finding the Fourth Proportional to 3,222.80, 4,856.15 and 2,650.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,222.80 : 4,856.15 = 2,650.62 : x
2. Step 2: Convert to fraction form
   3,222.80/4,856.15 = 2,650.62/x
3. Step 3: Cross multiply
   3,222.80x = 4,856.15 × 2,650.62
4. Step 4: Simplify right side
   3,222.80x = 12,871,814.94
5. Step 5: Solve for x
   x = 12,871,814.94/3,222.80
6. Step 6: Final answer
   x = 3,993.99