Finding the Fourth Proportional to 256,103.86, 353,443.35 and 142,943.62

Step by Step Solution

1. Step 1: Write the proportion equation
   256,103.86 : 353,443.35 = 142,943.62 : x
2. Step 2: Convert to fraction form
   256,103.86/353,443.35 = 142,943.62/x
3. Step 3: Cross multiply
   256,103.86x = 353,443.35 × 142,943.62
4. Step 4: Simplify right side
   256,103.86x = 50,522,471,913.93
5. Step 5: Solve for x
   x = 50,522,471,913.93/256,103.86
6. Step 6: Final answer
   x = 197,273.37