Finding the Fourth Proportional to 256,814.80, 354,414.87 and 142,091.59

Step by Step Solution

1. Step 1: Write the proportion equation
   256,814.80 : 354,414.87 = 142,091.59 : x
2. Step 2: Convert to fraction form
   256,814.80/354,414.87 = 142,091.59/x
3. Step 3: Cross multiply
   256,814.80x = 354,414.87 × 142,091.59
4. Step 4: Simplify right side
   256,814.80x = 50,359,372,773.59
5. Step 5: Solve for x
   x = 50,359,372,773.59/256,814.80
6. Step 6: Final answer
   x = 196,092.17