Finding the Fourth Proportional to 256,899.34, 354,513.79 and 142,182.79

Step by Step Solution

1. Step 1: Write the proportion equation
   256,899.34 : 354,513.79 = 142,182.79 : x
2. Step 2: Convert to fraction form
   256,899.34/354,513.79 = 142,182.79/x
3. Step 3: Cross multiply
   256,899.34x = 354,513.79 × 142,182.79
4. Step 4: Simplify right side
   256,899.34x = 50,405,759,755.67
5. Step 5: Solve for x
   x = 50,405,759,755.67/256,899.34
6. Step 6: Final answer
   x = 196,208.21