Finding the Third Proportional to 199,622 and 300,243

Step by Step Solution

1. Step 1: Write the proportion equation
   199,622 : 300,243 = 300,243 : x
2. Step 2: Convert to fraction form
   199,622/300,243 = 300,243/x
3. Step 3: Cross multiply
   199,622x = 300,243 × 300,243
4. Step 4: Simplify right side
   199,622x = 90,145,859,049
5. Step 5: Solve for x
   x = 90,145,859,049/199,622
6. Step 6: Final answer
   x = 451,582.79