Finding the Fourth Proportional to 2,550.62, 3,825.03 and 818.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.62 : 3,825.03 = 818.78 : x
2. Step 2: Convert to fraction form
   2,550.62/3,825.03 = 818.78/x
3. Step 3: Cross multiply
   2,550.62x = 3,825.03 × 818.78
4. Step 4: Simplify right side
   2,550.62x = 3,131,858.06
5. Step 5: Solve for x
   x = 3,131,858.06/2,550.62
6. Step 6: Final answer
   x = 1,227.88