Finding the Third Proportional to 664,291.50 and 1,057,521

Step by Step Solution

1. Step 1: Write the proportion equation
   664,291.50 : 1,057,521 = 1,057,521 : x
2. Step 2: Convert to fraction form
   664,291.50/1,057,521 = 1,057,521/x
3. Step 3: Cross multiply
   664,291.50x = 1,057,521 × 1,057,521
4. Step 4: Simplify right side
   664,291.50x = 1,118,350,665,441
5. Step 5: Solve for x
   x = 1,118,350,665,441/664,291.50
6. Step 6: Final answer
   x = 1,683,523.97