Finding the Third Proportional to 144,388 and 222,218

Step by Step Solution

1. Step 1: Write the proportion equation
   144,388 : 222,218 = 222,218 : x
2. Step 2: Convert to fraction form
   144,388/222,218 = 222,218/x
3. Step 3: Cross multiply
   144,388x = 222,218 × 222,218
4. Step 4: Simplify right side
   144,388x = 49,380,839,524
5. Step 5: Solve for x
   x = 49,380,839,524/144,388
6. Step 6: Final answer
   x = 342,000.99