Finding the Fourth Proportional to 331,818.52, 497,673.10 and 142,309.50

Step by Step Solution

1. Step 1: Write the proportion equation
   331,818.52 : 497,673.10 = 142,309.50 : x
2. Step 2: Convert to fraction form
   331,818.52/497,673.10 = 142,309.50/x
3. Step 3: Cross multiply
   331,818.52x = 497,673.10 × 142,309.50
4. Step 4: Simplify right side
   331,818.52x = 70,823,606,824.54
5. Step 5: Solve for x
   x = 70,823,606,824.54/331,818.52
6. Step 6: Final answer
   x = 213,440.79