Finding the Fourth Proportional to 1,258.34, 1,736.34 and 698.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.34 : 1,736.34 = 698.73 : x
2. Step 2: Convert to fraction form
   1,258.34/1,736.34 = 698.73/x
3. Step 3: Cross multiply
   1,258.34x = 1,736.34 × 698.73
4. Step 4: Simplify right side
   1,258.34x = 1,213,223.72
5. Step 5: Solve for x
   x = 1,213,223.72/1,258.34
6. Step 6: Final answer
   x = 964.15