Finding the Fourth Proportional to 2,142.75, 2,957.25 and 1,258.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.75 : 2,957.25 = 1,258.63 : x
2. Step 2: Convert to fraction form
   2,142.75/2,957.25 = 1,258.63/x
3. Step 3: Cross multiply
   2,142.75x = 2,957.25 × 1,258.63
4. Step 4: Simplify right side
   2,142.75x = 3,722,083.57
5. Step 5: Solve for x
   x = 3,722,083.57/2,142.75
6. Step 6: Final answer
   x = 1,737.06