Finding the Third Proportional to 664,236 and 1,057,443

Step by Step Solution

1. Step 1: Write the proportion equation
   664,236 : 1,057,443 = 1,057,443 : x
2. Step 2: Convert to fraction form
   664,236/1,057,443 = 1,057,443/x
3. Step 3: Cross multiply
   664,236x = 1,057,443 × 1,057,443
4. Step 4: Simplify right side
   664,236x = 1,118,185,698,249
5. Step 5: Solve for x
   x = 1,118,185,698,249/664,236
6. Step 6: Final answer
   x = 1,683,416.28