Finding the Fourth Proportional to 1,258.60, 1,736.69 and 699.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.60 : 1,736.69 = 699.04 : x
2. Step 2: Convert to fraction form
   1,258.60/1,736.69 = 699.04/x
3. Step 3: Cross multiply
   1,258.60x = 1,736.69 × 699.04
4. Step 4: Simplify right side
   1,258.60x = 1,214,015.78
5. Step 5: Solve for x
   x = 1,214,015.78/1,258.60
6. Step 6: Final answer
   x = 964.58