Finding the Fourth Proportional to 1,258.69, 1,737.04 and 699.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.69 : 1,737.04 = 699.12 : x
2. Step 2: Convert to fraction form
   1,258.69/1,737.04 = 699.12/x
3. Step 3: Cross multiply
   1,258.69x = 1,737.04 × 699.12
4. Step 4: Simplify right side
   1,258.69x = 1,214,399.40
5. Step 5: Solve for x
   x = 1,214,399.40/1,258.69
6. Step 6: Final answer
   x = 964.81