Finding the Fourth Proportional to 1,258.62, 1,736.83 and 699.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.62 : 1,736.83 = 699.05 : x
2. Step 2: Convert to fraction form
   1,258.62/1,736.83 = 699.05/x
3. Step 3: Cross multiply
   1,258.62x = 1,736.83 × 699.05
4. Step 4: Simplify right side
   1,258.62x = 1,214,131.01
5. Step 5: Solve for x
   x = 1,214,131.01/1,258.62
6. Step 6: Final answer
   x = 964.65