Finding the Fourth Proportional to 2,550.38, 3,826.24 and 819.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.38 : 3,826.24 = 819.05 : x
2. Step 2: Convert to fraction form
   2,550.38/3,826.24 = 819.05/x
3. Step 3: Cross multiply
   2,550.38x = 3,826.24 × 819.05
4. Step 4: Simplify right side
   2,550.38x = 3,133,860.69
5. Step 5: Solve for x
   x = 3,133,860.69/2,550.38
6. Step 6: Final answer
   x = 1,228.78