Finding the Fourth Proportional to 2,150.34, 3,225.91 and 689.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.34 : 3,225.91 = 689.50 : x
2. Step 2: Convert to fraction form
   2,150.34/3,225.91 = 689.50/x
3. Step 3: Cross multiply
   2,150.34x = 3,225.91 × 689.50
4. Step 4: Simplify right side
   2,150.34x = 2,224,264.95
5. Step 5: Solve for x
   x = 2,224,264.95/2,150.34
6. Step 6: Final answer
   x = 1,034.38