Finding the Third Proportional to 212,612 and 447,256

Step by Step Solution

1. Step 1: Write the proportion equation
   212,612 : 447,256 = 447,256 : x
2. Step 2: Convert to fraction form
   212,612/447,256 = 447,256/x
3. Step 3: Cross multiply
   212,612x = 447,256 × 447,256
4. Step 4: Simplify right side
   212,612x = 200,037,929,536
5. Step 5: Solve for x
   x = 200,037,929,536/212,612
6. Step 6: Final answer
   x = 940,859.07