Finding the Fourth Proportional to 2,279.46, 3,418.71 and 818.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.46 : 3,418.71 = 818.42 : x
2. Step 2: Convert to fraction form
   2,279.46/3,418.71 = 818.42/x
3. Step 3: Cross multiply
   2,279.46x = 3,418.71 × 818.42
4. Step 4: Simplify right side
   2,279.46x = 2,797,940.64
5. Step 5: Solve for x
   x = 2,797,940.64/2,279.46
6. Step 6: Final answer
   x = 1,227.46