Finding the Fourth Proportional to 2,151.30, 3,224.88 and 689.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.30 : 3,224.88 = 689.52 : x
2. Step 2: Convert to fraction form
   2,151.30/3,224.88 = 689.52/x
3. Step 3: Cross multiply
   2,151.30x = 3,224.88 × 689.52
4. Step 4: Simplify right side
   2,151.30x = 2,223,619.26
5. Step 5: Solve for x
   x = 2,223,619.26/2,151.30
6. Step 6: Final answer
   x = 1,033.62