Finding the Fourth Proportional to 2,142.28, 2,956.25 and 1,258.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.28 : 2,956.25 = 1,258.03 : x
2. Step 2: Convert to fraction form
   2,142.28/2,956.25 = 1,258.03/x
3. Step 3: Cross multiply
   2,142.28x = 2,956.25 × 1,258.03
4. Step 4: Simplify right side
   2,142.28x = 3,719,050.95
5. Step 5: Solve for x
   x = 3,719,050.95/2,142.28
6. Step 6: Final answer
   x = 1,736.02