Finding the Third Proportional to 161,443 and 221,617.50

Step by Step Solution

1. Step 1: Write the proportion equation
   161,443 : 221,617.50 = 221,617.50 : x
2. Step 2: Convert to fraction form
   161,443/221,617.50 = 221,617.50/x
3. Step 3: Cross multiply
   161,443x = 221,617.50 × 221,617.50
4. Step 4: Simplify right side
   161,443x = 49,114,316,306.25
5. Step 5: Solve for x
   x = 49,114,316,306.25/161,443
6. Step 6: Final answer
   x = 304,220.79