Finding the Third Proportional to 305,142 and 443,862

Step by Step Solution

1. Step 1: Write the proportion equation
   305,142 : 443,862 = 443,862 : x
2. Step 2: Convert to fraction form
   305,142/443,862 = 443,862/x
3. Step 3: Cross multiply
   305,142x = 443,862 × 443,862
4. Step 4: Simplify right side
   305,142x = 197,013,475,044
5. Step 5: Solve for x
   x = 197,013,475,044/305,142
6. Step 6: Final answer
   x = 645,645.22