Finding the Fourth Proportional to 1,258.71, 1,737.29 and 699.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.71 : 1,737.29 = 699.37 : x
2. Step 2: Convert to fraction form
   1,258.71/1,737.29 = 699.37/x
3. Step 3: Cross multiply
   1,258.71x = 1,737.29 × 699.37
4. Step 4: Simplify right side
   1,258.71x = 1,215,005.91
5. Step 5: Solve for x
   x = 1,215,005.91/1,258.71
6. Step 6: Final answer
   x = 965.28