Finding the Third Proportional to 144,388 and 216,582

Step by Step Solution

1. Step 1: Write the proportion equation
   144,388 : 216,582 = 216,582 : x
2. Step 2: Convert to fraction form
   144,388/216,582 = 216,582/x
3. Step 3: Cross multiply
   144,388x = 216,582 × 216,582
4. Step 4: Simplify right side
   144,388x = 46,907,762,724
5. Step 5: Solve for x
   x = 46,907,762,724/144,388
6. Step 6: Final answer
   x = 324,873