Finding the Third Proportional to 142,712 and 222,238

Step by Step Solution

1. Step 1: Write the proportion equation
   142,712 : 222,238 = 222,238 : x
2. Step 2: Convert to fraction form
   142,712/222,238 = 222,238/x
3. Step 3: Cross multiply
   142,712x = 222,238 × 222,238
4. Step 4: Simplify right side
   142,712x = 49,389,728,644
5. Step 5: Solve for x
   x = 49,389,728,644/142,712
6. Step 6: Final answer
   x = 346,079.72