Finding the Third Proportional to 142,436 and 221,424

Step by Step Solution

1. Step 1: Write the proportion equation
   142,436 : 221,424 = 221,424 : x
2. Step 2: Convert to fraction form
   142,436/221,424 = 221,424/x
3. Step 3: Cross multiply
   142,436x = 221,424 × 221,424
4. Step 4: Simplify right side
   142,436x = 49,028,587,776
5. Step 5: Solve for x
   x = 49,028,587,776/142,436
6. Step 6: Final answer
   x = 344,214.86