Finding the Fourth Proportional to 1,229.97, 1,697.25 and 698.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,229.97 : 1,697.25 = 698.82 : x
2. Step 2: Convert to fraction form
   1,229.97/1,697.25 = 698.82/x
3. Step 3: Cross multiply
   1,229.97x = 1,697.25 × 698.82
4. Step 4: Simplify right side
   1,229.97x = 1,186,072.25
5. Step 5: Solve for x
   x = 1,186,072.25/1,229.97
6. Step 6: Final answer
   x = 964.31