Finding the Fourth Proportional to 2,150.86, 3,226.14 and 689.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.86 : 3,226.14 = 689.89 : x
2. Step 2: Convert to fraction form
   2,150.86/3,226.14 = 689.89/x
3. Step 3: Cross multiply
   2,150.86x = 3,226.14 × 689.89
4. Step 4: Simplify right side
   2,150.86x = 2,225,681.72
5. Step 5: Solve for x
   x = 2,225,681.72/2,150.86
6. Step 6: Final answer
   x = 1,034.79