Finding the Fourth Proportional to 1,258.71, 1,736.83 and 699.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.71 : 1,736.83 = 699.18 : x
2. Step 2: Convert to fraction form
   1,258.71/1,736.83 = 699.18/x
3. Step 3: Cross multiply
   1,258.71x = 1,736.83 × 699.18
4. Step 4: Simplify right side
   1,258.71x = 1,214,359.95
5. Step 5: Solve for x
   x = 1,214,359.95/1,258.71
6. Step 6: Final answer
   x = 964.76