Finding the Third Proportional to 142,608 and 221,712

Step by Step Solution

1. Step 1: Write the proportion equation
   142,608 : 221,712 = 221,712 : x
2. Step 2: Convert to fraction form
   142,608/221,712 = 221,712/x
3. Step 3: Cross multiply
   142,608x = 221,712 × 221,712
4. Step 4: Simplify right side
   142,608x = 49,156,210,944
5. Step 5: Solve for x
   x = 49,156,210,944/142,608
6. Step 6: Final answer
   x = 344,694.62