Finding the Fourth Proportional to 307,456.50, 424,289.98 and 173,320.50

Step by Step Solution

1. Step 1: Write the proportion equation
   307,456.50 : 424,289.98 = 173,320.50 : x
2. Step 2: Convert to fraction form
   307,456.50/424,289.98 = 173,320.50/x
3. Step 3: Cross multiply
   307,456.50x = 424,289.98 × 173,320.50
4. Step 4: Simplify right side
   307,456.50x = 73,538,151,478.59
5. Step 5: Solve for x
   x = 73,538,151,478.59/307,456.50
6. Step 6: Final answer
   x = 239,182.30