Finding the Fourth Proportional to 2,550.76, 3,826.06 and 819.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.76 : 3,826.06 = 819.40 : x
2. Step 2: Convert to fraction form
   2,550.76/3,826.06 = 819.40/x
3. Step 3: Cross multiply
   2,550.76x = 3,826.06 × 819.40
4. Step 4: Simplify right side
   2,550.76x = 3,135,073.56
5. Step 5: Solve for x
   x = 3,135,073.56/2,550.76
6. Step 6: Final answer
   x = 1,229.07