Finding the Fourth Proportional to 2,039.38, 2,814.10 and 1,155.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.38 : 2,814.10 = 1,155.15 : x
2. Step 2: Convert to fraction form
   2,039.38/2,814.10 = 1,155.15/x
3. Step 3: Cross multiply
   2,039.38x = 2,814.10 × 1,155.15
4. Step 4: Simplify right side
   2,039.38x = 3,250,704.73
5. Step 5: Solve for x
   x = 3,250,704.73/2,039.38
6. Step 6: Final answer
   x = 1,593.97