Finding the Fourth Proportional to 2,550.80, 3,825.30 and 818.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.80 : 3,825.30 = 818.84 : x
2. Step 2: Convert to fraction form
   2,550.80/3,825.30 = 818.84/x
3. Step 3: Cross multiply
   2,550.80x = 3,825.30 × 818.84
4. Step 4: Simplify right side
   2,550.80x = 3,132,308.65
5. Step 5: Solve for x
   x = 3,132,308.65/2,550.80
6. Step 6: Final answer
   x = 1,227.97