Finding the Fourth Proportional to 256,080.42, 353,391.27 and 142,903.14

Step by Step Solution

1. Step 1: Write the proportion equation
   256,080.42 : 353,391.27 = 142,903.14 : x
2. Step 2: Convert to fraction form
   256,080.42/353,391.27 = 142,903.14/x
3. Step 3: Cross multiply
   256,080.42x = 353,391.27 × 142,903.14
4. Step 4: Simplify right side
   256,080.42x = 50,500,722,131.59
5. Step 5: Solve for x
   x = 50,500,722,131.59/256,080.42
6. Step 6: Final answer
   x = 197,206.50