Finding the Fourth Proportional to 2,660.94, 3,992.88 and 1,017.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,660.94 : 3,992.88 = 1,017.72 : x
2. Step 2: Convert to fraction form
   2,660.94/3,992.88 = 1,017.72/x
3. Step 3: Cross multiply
   2,660.94x = 3,992.88 × 1,017.72
4. Step 4: Simplify right side
   2,660.94x = 4,063,633.83
5. Step 5: Solve for x
   x = 4,063,633.83/2,660.94
6. Step 6: Final answer
   x = 1,527.14