Finding the Fourth Proportional to 1,469.93, 2,205.27 and 689.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,469.93 : 2,205.27 = 689.78 : x
2. Step 2: Convert to fraction form
   1,469.93/2,205.27 = 689.78/x
3. Step 3: Cross multiply
   1,469.93x = 2,205.27 × 689.78
4. Step 4: Simplify right side
   1,469.93x = 1,521,147.69
5. Step 5: Solve for x
   x = 1,521,147.69/1,469.93
6. Step 6: Final answer
   x = 1,034.85