Finding the Fourth Proportional to 2,150.61, 3,225.70 and 689.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.61 : 3,225.70 = 689.37 : x
2. Step 2: Convert to fraction form
   2,150.61/3,225.70 = 689.37/x
3. Step 3: Cross multiply
   2,150.61x = 3,225.70 × 689.37
4. Step 4: Simplify right side
   2,150.61x = 2,223,700.81
5. Step 5: Solve for x
   x = 2,223,700.81/2,150.61
6. Step 6: Final answer
   x = 1,033.99