Finding the Fourth Proportional to 2,016.80, 3,026.41 and 862.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.80 : 3,026.41 = 862.55 : x
2. Step 2: Convert to fraction form
   2,016.80/3,026.41 = 862.55/x
3. Step 3: Cross multiply
   2,016.80x = 3,026.41 × 862.55
4. Step 4: Simplify right side
   2,016.80x = 2,610,429.95
5. Step 5: Solve for x
   x = 2,610,429.95/2,016.80
6. Step 6: Final answer
   x = 1,294.34