Finding the Fourth Proportional to 2,016.06, 3,025.29 and 861.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.06 : 3,025.29 = 861.78 : x
2. Step 2: Convert to fraction form
   2,016.06/3,025.29 = 861.78/x
3. Step 3: Cross multiply
   2,016.06x = 3,025.29 × 861.78
4. Step 4: Simplify right side
   2,016.06x = 2,607,134.42
5. Step 5: Solve for x
   x = 2,607,134.42/2,016.06
6. Step 6: Final answer
   x = 1,293.18