Finding the Fourth Proportional to 1,258.22, 1,736.37 and 698.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.22 : 1,736.37 = 698.73 : x
2. Step 2: Convert to fraction form
   1,258.22/1,736.37 = 698.73/x
3. Step 3: Cross multiply
   1,258.22x = 1,736.37 × 698.73
4. Step 4: Simplify right side
   1,258.22x = 1,213,247.72
5. Step 5: Solve for x
   x = 1,213,247.72/1,258.22
6. Step 6: Final answer
   x = 964.26