Finding the Fourth Proportional to 256,055.34, 353,367.46 and 142,878.09

Step by Step Solution

1. Step 1: Write the proportion equation
   256,055.34 : 353,367.46 = 142,878.09 : x
2. Step 2: Convert to fraction form
   256,055.34/353,367.46 = 142,878.09/x
3. Step 3: Cross multiply
   256,055.34x = 353,367.46 × 142,878.09
4. Step 4: Simplify right side
   256,055.34x = 50,488,469,256.68
5. Step 5: Solve for x
   x = 50,488,469,256.68/256,055.34
6. Step 6: Final answer
   x = 197,177.96