Finding the Third Proportional to 142,487 and 221,508.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,487 : 221,508.50 = 221,508.50 : x
2. Step 2: Convert to fraction form
   142,487/221,508.50 = 221,508.50/x
3. Step 3: Cross multiply
   142,487x = 221,508.50 × 221,508.50
4. Step 4: Simplify right side
   142,487x = 49,066,015,572.25
5. Step 5: Solve for x
   x = 49,066,015,572.25/142,487
6. Step 6: Final answer
   x = 344,354.33