Finding the Third Proportional to 212,416 and 443,422

Step by Step Solution

1. Step 1: Write the proportion equation
   212,416 : 443,422 = 443,422 : x
2. Step 2: Convert to fraction form
   212,416/443,422 = 443,422/x
3. Step 3: Cross multiply
   212,416x = 443,422 × 443,422
4. Step 4: Simplify right side
   212,416x = 196,623,070,084
5. Step 5: Solve for x
   x = 196,623,070,084/212,416
6. Step 6: Final answer
   x = 925,650.94