Finding the Third Proportional to 268,707 and 406,084.50

Step by Step Solution

1. Step 1: Write the proportion equation
   268,707 : 406,084.50 = 406,084.50 : x
2. Step 2: Convert to fraction form
   268,707/406,084.50 = 406,084.50/x
3. Step 3: Cross multiply
   268,707x = 406,084.50 × 406,084.50
4. Step 4: Simplify right side
   268,707x = 164,904,621,140.25
5. Step 5: Solve for x
   x = 164,904,621,140.25/268,707
6. Step 6: Final answer
   x = 613,696.78