Finding the Fourth Proportional to 2,039.59, 2,814.90 and 1,155.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.59 : 2,814.90 = 1,155.57 : x
2. Step 2: Convert to fraction form
   2,039.59/2,814.90 = 1,155.57/x
3. Step 3: Cross multiply
   2,039.59x = 2,814.90 × 1,155.57
4. Step 4: Simplify right side
   2,039.59x = 3,252,813.99
5. Step 5: Solve for x
   x = 3,252,813.99/2,039.59
6. Step 6: Final answer
   x = 1,594.84