Finding the Fourth Proportional to 2,150.25, 3,225.07 and 689.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.25 : 3,225.07 = 689.21 : x
2. Step 2: Convert to fraction form
   2,150.25/3,225.07 = 689.21/x
3. Step 3: Cross multiply
   2,150.25x = 3,225.07 × 689.21
4. Step 4: Simplify right side
   2,150.25x = 2,222,743.45
5. Step 5: Solve for x
   x = 2,222,743.45/2,150.25
6. Step 6: Final answer
   x = 1,033.72