Finding the Fourth Proportional to 401,019.50, 553,407.03 and 239,881.34

Step by Step Solution

1. Step 1: Write the proportion equation
   401,019.50 : 553,407.03 = 239,881.34 : x
2. Step 2: Convert to fraction form
   401,019.50/553,407.03 = 239,881.34/x
3. Step 3: Cross multiply
   401,019.50x = 553,407.03 × 239,881.34
4. Step 4: Simplify right side
   401,019.50x = 132,752,019,921.82
5. Step 5: Solve for x
   x = 132,752,019,921.82/401,019.50
6. Step 6: Final answer
   x = 331,036.32