Finding the Fourth Proportional to 2,815.22, 3,882.78 and 2,626.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,815.22 : 3,882.78 = 2,626.59 : x
2. Step 2: Convert to fraction form
   2,815.22/3,882.78 = 2,626.59/x
3. Step 3: Cross multiply
   2,815.22x = 3,882.78 × 2,626.59
4. Step 4: Simplify right side
   2,815.22x = 10,198,471.12
5. Step 5: Solve for x
   x = 10,198,471.12/2,815.22
6. Step 6: Final answer
   x = 3,622.63