Finding the Fourth Proportional to 2,040.12, 2,815.43 and 1,155.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,040.12 : 2,815.43 = 1,155.89 : x
2. Step 2: Convert to fraction form
   2,040.12/2,815.43 = 1,155.89/x
3. Step 3: Cross multiply
   2,040.12x = 2,815.43 × 1,155.89
4. Step 4: Simplify right side
   2,040.12x = 3,254,328.64
5. Step 5: Solve for x
   x = 3,254,328.64/2,040.12
6. Step 6: Final answer
   x = 1,595.17