Finding the Fourth Proportional to 2,279.28, 3,419.57 and 818.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.28 : 3,419.57 = 818.54 : x
2. Step 2: Convert to fraction form
   2,279.28/3,419.57 = 818.54/x
3. Step 3: Cross multiply
   2,279.28x = 3,419.57 × 818.54
4. Step 4: Simplify right side
   2,279.28x = 2,799,054.83
5. Step 5: Solve for x
   x = 2,799,054.83/2,279.28
6. Step 6: Final answer
   x = 1,228.04