Finding the Fourth Proportional to 1,706.39, 2,355.98 and 1,258.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,706.39 : 2,355.98 = 1,258.31 : x
2. Step 2: Convert to fraction form
   1,706.39/2,355.98 = 1,258.31/x
3. Step 3: Cross multiply
   1,706.39x = 2,355.98 × 1,258.31
4. Step 4: Simplify right side
   1,706.39x = 2,964,562.23
5. Step 5: Solve for x
   x = 2,964,562.23/1,706.39
6. Step 6: Final answer
   x = 1,737.33