Finding the Third Proportional to 142,212 and 307,227

Step by Step Solution

1. Step 1: Write the proportion equation
   142,212 : 307,227 = 307,227 : x
2. Step 2: Convert to fraction form
   142,212/307,227 = 307,227/x
3. Step 3: Cross multiply
   142,212x = 307,227 × 307,227
4. Step 4: Simplify right side
   142,212x = 94,388,429,529
5. Step 5: Solve for x
   x = 94,388,429,529/142,212
6. Step 6: Final answer
   x = 663,716.35