Finding the Fourth Proportional to 2,279.52, 3,418.56 and 818.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.52 : 3,418.56 = 818.88 : x
2. Step 2: Convert to fraction form
   2,279.52/3,418.56 = 818.88/x
3. Step 3: Cross multiply
   2,279.52x = 3,418.56 × 818.88
4. Step 4: Simplify right side
   2,279.52x = 2,799,390.41
5. Step 5: Solve for x
   x = 2,799,390.41/2,279.52
6. Step 6: Final answer
   x = 1,228.06