Finding the Fourth Proportional to 2,660.58, 3,987.17 and 1,359.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,660.58 : 3,987.17 = 1,359.30 : x
2. Step 2: Convert to fraction form
   2,660.58/3,987.17 = 1,359.30/x
3. Step 3: Cross multiply
   2,660.58x = 3,987.17 × 1,359.30
4. Step 4: Simplify right side
   2,660.58x = 5,419,760.18
5. Step 5: Solve for x
   x = 5,419,760.18/2,660.58
6. Step 6: Final answer
   x = 2,037.06