Finding the Fourth Proportional to 2,660.48, 3,989.76 and 1,016.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,660.48 : 3,989.76 = 1,016.96 : x
2. Step 2: Convert to fraction form
   2,660.48/3,989.76 = 1,016.96/x
3. Step 3: Cross multiply
   2,660.48x = 3,989.76 × 1,016.96
4. Step 4: Simplify right side
   2,660.48x = 4,057,426.33
5. Step 5: Solve for x
   x = 4,057,426.33/2,660.48
6. Step 6: Final answer
   x = 1,525.07