Finding the Third Proportional to 206,912 and 443,353

Step by Step Solution

1. Step 1: Write the proportion equation
   206,912 : 443,353 = 443,353 : x
2. Step 2: Convert to fraction form
   206,912/443,353 = 443,353/x
3. Step 3: Cross multiply
   206,912x = 443,353 × 443,353
4. Step 4: Simplify right side
   206,912x = 196,561,882,609
5. Step 5: Solve for x
   x = 196,561,882,609/206,912
6. Step 6: Final answer
   x = 949,978.17