Finding the Fourth Proportional to 2,159.27, 3,239.37 and 698.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,159.27 : 3,239.37 = 698.57 : x
2. Step 2: Convert to fraction form
   2,159.27/3,239.37 = 698.57/x
3. Step 3: Cross multiply
   2,159.27x = 3,239.37 × 698.57
4. Step 4: Simplify right side
   2,159.27x = 2,262,910.50
5. Step 5: Solve for x
   x = 2,262,910.50/2,159.27
6. Step 6: Final answer
   x = 1,048.00