Finding the Fourth Proportional to 2,660.57, 3,992.51 and 1,017.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,660.57 : 3,992.51 = 1,017.29 : x
2. Step 2: Convert to fraction form
   2,660.57/3,992.51 = 1,017.29/x
3. Step 3: Cross multiply
   2,660.57x = 3,992.51 × 1,017.29
4. Step 4: Simplify right side
   2,660.57x = 4,061,540.50
5. Step 5: Solve for x
   x = 4,061,540.50/2,660.57
6. Step 6: Final answer
   x = 1,526.57