Finding the Fourth Proportional to 257,076.72, 354,760.20 and 142,348.68

Step by Step Solution

1. Step 1: Write the proportion equation
   257,076.72 : 354,760.20 = 142,348.68 : x
2. Step 2: Convert to fraction form
   257,076.72/354,760.20 = 142,348.68/x
3. Step 3: Cross multiply
   257,076.72x = 354,760.20 × 142,348.68
4. Step 4: Simplify right side
   257,076.72x = 50,499,646,186.54
5. Step 5: Solve for x
   x = 50,499,646,186.54/257,076.72
6. Step 6: Final answer
   x = 196,438.04