Finding the Fourth Proportional to 2,142.38, 2,956.54 and 1,258.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.38 : 2,956.54 = 1,258.22 : x
2. Step 2: Convert to fraction form
   2,142.38/2,956.54 = 1,258.22/x
3. Step 3: Cross multiply
   2,142.38x = 2,956.54 × 1,258.22
4. Step 4: Simplify right side
   2,142.38x = 3,719,977.76
5. Step 5: Solve for x
   x = 3,719,977.76/2,142.38
6. Step 6: Final answer
   x = 1,736.38