Finding the Fourth Proportional to 238,506.96, 329,067.76 and 142,978.80

Step by Step Solution

1. Step 1: Write the proportion equation
   238,506.96 : 329,067.76 = 142,978.80 : x
2. Step 2: Convert to fraction form
   238,506.96/329,067.76 = 142,978.80/x
3. Step 3: Cross multiply
   238,506.96x = 329,067.76 × 142,978.80
4. Step 4: Simplify right side
   238,506.96x = 47,049,713,443.49
5. Step 5: Solve for x
   x = 47,049,713,443.49/238,506.96
6. Step 6: Final answer
   x = 197,267.67