Finding the Third Proportional to 206,921 and 443,359

Step by Step Solution

1. Step 1: Write the proportion equation
   206,921 : 443,359 = 443,359 : x
2. Step 2: Convert to fraction form
   206,921/443,359 = 443,359/x
3. Step 3: Cross multiply
   206,921x = 443,359 × 443,359
4. Step 4: Simplify right side
   206,921x = 196,567,202,881
5. Step 5: Solve for x
   x = 196,567,202,881/206,921
6. Step 6: Final answer
   x = 949,962.56