Finding the Fourth Proportional to 2,661.31, 3,989.94 and 1,017.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.31 : 3,989.94 = 1,017.82 : x
2. Step 2: Convert to fraction form
   2,661.31/3,989.94 = 1,017.82/x
3. Step 3: Cross multiply
   2,661.31x = 3,989.94 × 1,017.82
4. Step 4: Simplify right side
   2,661.31x = 4,061,040.73
5. Step 5: Solve for x
   x = 4,061,040.73/2,661.31
6. Step 6: Final answer
   x = 1,525.96