Finding the Fourth Proportional to 2,280.42, 3,419.82 and 819.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.42 : 3,419.82 = 819.18 : x
2. Step 2: Convert to fraction form
   2,280.42/3,419.82 = 819.18/x
3. Step 3: Cross multiply
   2,280.42x = 3,419.82 × 819.18
4. Step 4: Simplify right side
   2,280.42x = 2,801,448.15
5. Step 5: Solve for x
   x = 2,801,448.15/2,280.42
6. Step 6: Final answer
   x = 1,228.48