Finding the Fourth Proportional to 2,039.30, 2,814.31 and 1,155.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.30 : 2,814.31 = 1,155.18 : x
2. Step 2: Convert to fraction form
   2,039.30/2,814.31 = 1,155.18/x
3. Step 3: Cross multiply
   2,039.30x = 2,814.31 × 1,155.18
4. Step 4: Simplify right side
   2,039.30x = 3,251,046.62
5. Step 5: Solve for x
   x = 3,251,046.62/2,039.30
6. Step 6: Final answer
   x = 1,594.20