Finding the Third Proportional to 142,486 and 222,355

Step by Step Solution

1. Step 1: Write the proportion equation
   142,486 : 222,355 = 222,355 : x
2. Step 2: Convert to fraction form
   142,486/222,355 = 222,355/x
3. Step 3: Cross multiply
   142,486x = 222,355 × 222,355
4. Step 4: Simplify right side
   142,486x = 49,441,746,025
5. Step 5: Solve for x
   x = 49,441,746,025/142,486
6. Step 6: Final answer
   x = 346,993.71