Finding the Third Proportional to 664,238 and 1,057,446

Step by Step Solution

1. Step 1: Write the proportion equation
   664,238 : 1,057,446 = 1,057,446 : x
2. Step 2: Convert to fraction form
   664,238/1,057,446 = 1,057,446/x
3. Step 3: Cross multiply
   664,238x = 1,057,446 × 1,057,446
4. Step 4: Simplify right side
   664,238x = 1,118,192,042,916
5. Step 5: Solve for x
   x = 1,118,192,042,916/664,238
6. Step 6: Final answer
   x = 1,683,420.77