Finding the Fourth Proportional to 256,131.82, 353,429.31 and 142,959.34

Step by Step Solution

1. Step 1: Write the proportion equation
   256,131.82 : 353,429.31 = 142,959.34 : x
2. Step 2: Convert to fraction form
   256,131.82/353,429.31 = 142,959.34/x
3. Step 3: Cross multiply
   256,131.82x = 353,429.31 × 142,959.34
4. Step 4: Simplify right side
   256,131.82x = 50,526,020,894.26
5. Step 5: Solve for x
   x = 50,526,020,894.26/256,131.82
6. Step 6: Final answer
   x = 197,265.69