Finding the Fourth Proportional to 2,040.12, 2,815.16 and 1,143.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,040.12 : 2,815.16 = 1,143.99 : x
2. Step 2: Convert to fraction form
   2,040.12/2,815.16 = 1,143.99/x
3. Step 3: Cross multiply
   2,040.12x = 2,815.16 × 1,143.99
4. Step 4: Simplify right side
   2,040.12x = 3,220,509.17
5. Step 5: Solve for x
   x = 3,220,509.17/2,040.12
6. Step 6: Final answer
   x = 1,578.59