Finding the Fourth Proportional to 2,550.72, 3,826.72 and 819.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.72 : 3,826.72 = 819.52 : x
2. Step 2: Convert to fraction form
   2,550.72/3,826.72 = 819.52/x
3. Step 3: Cross multiply
   2,550.72x = 3,826.72 × 819.52
4. Step 4: Simplify right side
   2,550.72x = 3,136,073.57
5. Step 5: Solve for x
   x = 3,136,073.57/2,550.72
6. Step 6: Final answer
   x = 1,229.49