Finding the Third Proportional to 142,616 and 221,812

Step by Step Solution

1. Step 1: Write the proportion equation
   142,616 : 221,812 = 221,812 : x
2. Step 2: Convert to fraction form
   142,616/221,812 = 221,812/x
3. Step 3: Cross multiply
   142,616x = 221,812 × 221,812
4. Step 4: Simplify right side
   142,616x = 49,200,563,344
5. Step 5: Solve for x
   x = 49,200,563,344/142,616
6. Step 6: Final answer
   x = 344,986.28