Finding the Fourth Proportional to 2,462.57, 3,694.07 and 819.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,462.57 : 3,694.07 = 819.12 : x
2. Step 2: Convert to fraction form
   2,462.57/3,694.07 = 819.12/x
3. Step 3: Cross multiply
   2,462.57x = 3,694.07 × 819.12
4. Step 4: Simplify right side
   2,462.57x = 3,025,882.52
5. Step 5: Solve for x
   x = 3,025,882.52/2,462.57
6. Step 6: Final answer
   x = 1,228.75