Finding the Fourth Proportional to 2,142.47, 2,957.57 and 1,258.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.47 : 2,957.57 = 1,258.33 : x
2. Step 2: Convert to fraction form
   2,142.47/2,957.57 = 1,258.33/x
3. Step 3: Cross multiply
   2,142.47x = 2,957.57 × 1,258.33
4. Step 4: Simplify right side
   2,142.47x = 3,721,599.06
5. Step 5: Solve for x
   x = 3,721,599.06/2,142.47
6. Step 6: Final answer
   x = 1,737.06