Finding the Fourth Proportional to 2,142.42, 2,956.66 and 1,258.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.42 : 2,956.66 = 1,258.48 : x
2. Step 2: Convert to fraction form
   2,142.42/2,956.66 = 1,258.48/x
3. Step 3: Cross multiply
   2,142.42x = 2,956.66 × 1,258.48
4. Step 4: Simplify right side
   2,142.42x = 3,720,897.48
5. Step 5: Solve for x
   x = 3,720,897.48/2,142.42
6. Step 6: Final answer
   x = 1,736.77