Finding the Fourth Proportional to 2,550.15, 3,824.82 and 818.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.15 : 3,824.82 = 818.78 : x
2. Step 2: Convert to fraction form
   2,550.15/3,824.82 = 818.78/x
3. Step 3: Cross multiply
   2,550.15x = 3,824.82 × 818.78
4. Step 4: Simplify right side
   2,550.15x = 3,131,667.00
5. Step 5: Solve for x
   x = 3,131,667.00/2,550.15
6. Step 6: Final answer
   x = 1,228.03