Finding the Fourth Proportional to 2,039.20, 2,814.14 and 1,155.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.20 : 2,814.14 = 1,155.12 : x
2. Step 2: Convert to fraction form
   2,039.20/2,814.14 = 1,155.12/x
3. Step 3: Cross multiply
   2,039.20x = 2,814.14 × 1,155.12
4. Step 4: Simplify right side
   2,039.20x = 3,250,669.40
5. Step 5: Solve for x
   x = 3,250,669.40/2,039.20
6. Step 6: Final answer
   x = 1,594.09