Finding the Fourth Proportional to 2,142.42, 2,957.50 and 1,258.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.42 : 2,957.50 = 1,258.28 : x
2. Step 2: Convert to fraction form
   2,142.42/2,957.50 = 1,258.28/x
3. Step 3: Cross multiply
   2,142.42x = 2,957.50 × 1,258.28
4. Step 4: Simplify right side
   2,142.42x = 3,721,356.26
5. Step 5: Solve for x
   x = 3,721,356.26/2,142.42
6. Step 6: Final answer
   x = 1,736.99