Finding the Fourth Proportional to 2,040.80, 2,815.16 and 1,254.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,040.80 : 2,815.16 = 1,254.69 : x
2. Step 2: Convert to fraction form
   2,040.80/2,815.16 = 1,254.69/x
3. Step 3: Cross multiply
   2,040.80x = 2,815.16 × 1,254.69
4. Step 4: Simplify right side
   2,040.80x = 3,532,146.83
5. Step 5: Solve for x
   x = 3,532,146.83/2,040.80
6. Step 6: Final answer
   x = 1,730.77