Finding the Fourth Proportional to 2,660.39, 3,987.84 and 1,016.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,660.39 : 3,987.84 = 1,016.49 : x
2. Step 2: Convert to fraction form
   2,660.39/3,987.84 = 1,016.49/x
3. Step 3: Cross multiply
   2,660.39x = 3,987.84 × 1,016.49
4. Step 4: Simplify right side
   2,660.39x = 4,053,599.48
5. Step 5: Solve for x
   x = 4,053,599.48/2,660.39
6. Step 6: Final answer
   x = 1,523.69