Finding the Fourth Proportional to 2,662.64, 3,992.07 and 1,017.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.64 : 3,992.07 = 1,017.80 : x
2. Step 2: Convert to fraction form
   2,662.64/3,992.07 = 1,017.80/x
3. Step 3: Cross multiply
   2,662.64x = 3,992.07 × 1,017.80
4. Step 4: Simplify right side
   2,662.64x = 4,063,142.64
5. Step 5: Solve for x
   x = 4,063,142.64/2,662.64
6. Step 6: Final answer
   x = 1,525.98