Finding the Fourth Proportional to 256,829.98, 354,435.78 and 142,106.62

Step by Step Solution

1. Step 1: Write the proportion equation
   256,829.98 : 354,435.78 = 142,106.62 : x
2. Step 2: Convert to fraction form
   256,829.98/354,435.78 = 142,106.62/x
3. Step 3: Cross multiply
   256,829.98x = 354,435.78 × 142,106.62
4. Step 4: Simplify right side
   256,829.98x = 50,367,670,702.86
5. Step 5: Solve for x
   x = 50,367,670,702.86/256,829.98
6. Step 6: Final answer
   x = 196,112.89