Finding the Third Proportional to 209,231 and 268,648.50

Step by Step Solution

1. Step 1: Write the proportion equation
   209,231 : 268,648.50 = 268,648.50 : x
2. Step 2: Convert to fraction form
   209,231/268,648.50 = 268,648.50/x
3. Step 3: Cross multiply
   209,231x = 268,648.50 × 268,648.50
4. Step 4: Simplify right side
   209,231x = 72,172,016,552.25
5. Step 5: Solve for x
   x = 72,172,016,552.25/209,231
6. Step 6: Final answer
   x = 344,939.40