Finding the Fourth Proportional to 2,150.76, 3,226.34 and 689.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.76 : 3,226.34 = 689.56 : x
2. Step 2: Convert to fraction form
   2,150.76/3,226.34 = 689.56/x
3. Step 3: Cross multiply
   2,150.76x = 3,226.34 × 689.56
4. Step 4: Simplify right side
   2,150.76x = 2,224,755.01
5. Step 5: Solve for x
   x = 2,224,755.01/2,150.76
6. Step 6: Final answer
   x = 1,034.40