Finding the Third Proportional to 139,459 and 221,622

Step by Step Solution

1. Step 1: Write the proportion equation
   139,459 : 221,622 = 221,622 : x
2. Step 2: Convert to fraction form
   139,459/221,622 = 221,622/x
3. Step 3: Cross multiply
   139,459x = 221,622 × 221,622
4. Step 4: Simplify right side
   139,459x = 49,116,310,884
5. Step 5: Solve for x
   x = 49,116,310,884/139,459
6. Step 6: Final answer
   x = 352,191.76