Finding the Third Proportional to 142,417 and 221,401.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,417 : 221,401.50 = 221,401.50 : x
2. Step 2: Convert to fraction form
   142,417/221,401.50 = 221,401.50/x
3. Step 3: Cross multiply
   142,417x = 221,401.50 × 221,401.50
4. Step 4: Simplify right side
   142,417x = 49,018,624,202.25
5. Step 5: Solve for x
   x = 49,018,624,202.25/142,417
6. Step 6: Final answer
   x = 344,190.82