Finding the Fourth Proportional to 1,258.34, 1,736.52 and 698.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.34 : 1,736.52 = 698.81 : x
2. Step 2: Convert to fraction form
   1,258.34/1,736.52 = 698.81/x
3. Step 3: Cross multiply
   1,258.34x = 1,736.52 × 698.81
4. Step 4: Simplify right side
   1,258.34x = 1,213,502.47
5. Step 5: Solve for x
   x = 1,213,502.47/1,258.34
6. Step 6: Final answer
   x = 964.37