Finding the Fourth Proportional to 2,550.42, 3,824.82 and 818.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.42 : 3,824.82 = 818.64 : x
2. Step 2: Convert to fraction form
   2,550.42/3,824.82 = 818.64/x
3. Step 3: Cross multiply
   2,550.42x = 3,824.82 × 818.64
4. Step 4: Simplify right side
   2,550.42x = 3,131,150.64
5. Step 5: Solve for x
   x = 3,131,150.64/2,550.42
6. Step 6: Final answer
   x = 1,227.70