Finding the Third Proportional to 142,027 and 309,477

Step by Step Solution

1. Step 1: Write the proportion equation
   142,027 : 309,477 = 309,477 : x
2. Step 2: Convert to fraction form
   142,027/309,477 = 309,477/x
3. Step 3: Cross multiply
   142,027x = 309,477 × 309,477
4. Step 4: Simplify right side
   142,027x = 95,776,013,529
5. Step 5: Solve for x
   x = 95,776,013,529/142,027
6. Step 6: Final answer
   x = 674,350.75