Finding the Fourth Proportional to 2,379.54, 3,569.52 and 819.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.54 : 3,569.52 = 819.74 : x
2. Step 2: Convert to fraction form
   2,379.54/3,569.52 = 819.74/x
3. Step 3: Cross multiply
   2,379.54x = 3,569.52 × 819.74
4. Step 4: Simplify right side
   2,379.54x = 2,926,078.32
5. Step 5: Solve for x
   x = 2,926,078.32/2,379.54
6. Step 6: Final answer
   x = 1,229.68