Finding the Fourth Proportional to 401,017.50, 553,404.27 and 239,879.34

Step by Step Solution

1. Step 1: Write the proportion equation
   401,017.50 : 553,404.27 = 239,879.34 : x
2. Step 2: Convert to fraction form
   401,017.50/553,404.27 = 239,879.34/x
3. Step 3: Cross multiply
   401,017.50x = 553,404.27 × 239,879.34
4. Step 4: Simplify right side
   401,017.50x = 132,750,251,040.78
5. Step 5: Solve for x
   x = 132,750,251,040.78/401,017.50
6. Step 6: Final answer
   x = 331,033.56