Finding the Third Proportional to 142,663 and 301,243

Step by Step Solution

1. Step 1: Write the proportion equation
   142,663 : 301,243 = 301,243 : x
2. Step 2: Convert to fraction form
   142,663/301,243 = 301,243/x
3. Step 3: Cross multiply
   142,663x = 301,243 × 301,243
4. Step 4: Simplify right side
   142,663x = 90,747,345,049
5. Step 5: Solve for x
   x = 90,747,345,049/142,663
6. Step 6: Final answer
   x = 636,095.87