Finding the Fourth Proportional to 1,258.53, 1,736.78 and 699.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.53 : 1,736.78 = 699.04 : x
2. Step 2: Convert to fraction form
   1,258.53/1,736.78 = 699.04/x
3. Step 3: Cross multiply
   1,258.53x = 1,736.78 × 699.04
4. Step 4: Simplify right side
   1,258.53x = 1,214,078.69
5. Step 5: Solve for x
   x = 1,214,078.69/1,258.53
6. Step 6: Final answer
   x = 964.68