Finding the Fourth Proportional to 2,039.92, 2,815.17 and 1,155.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.92 : 2,815.17 = 1,155.71 : x
2. Step 2: Convert to fraction form
   2,039.92/2,815.17 = 1,155.71/x
3. Step 3: Cross multiply
   2,039.92x = 2,815.17 × 1,155.71
4. Step 4: Simplify right side
   2,039.92x = 3,253,520.12
5. Step 5: Solve for x
   x = 3,253,520.12/2,039.92
6. Step 6: Final answer
   x = 1,594.93