Finding the Third Proportional to 139,824 and 221,508

Step by Step Solution

1. Step 1: Write the proportion equation
   139,824 : 221,508 = 221,508 : x
2. Step 2: Convert to fraction form
   139,824/221,508 = 221,508/x
3. Step 3: Cross multiply
   139,824x = 221,508 × 221,508
4. Step 4: Simplify right side
   139,824x = 49,065,794,064
5. Step 5: Solve for x
   x = 49,065,794,064/139,824
6. Step 6: Final answer
   x = 350,911.10