Finding the Third Proportional to 664,266 and 1,057,488

Step by Step Solution

1. Step 1: Write the proportion equation
   664,266 : 1,057,488 = 1,057,488 : x
2. Step 2: Convert to fraction form
   664,266/1,057,488 = 1,057,488/x
3. Step 3: Cross multiply
   664,266x = 1,057,488 × 1,057,488
4. Step 4: Simplify right side
   664,266x = 1,118,280,870,144
5. Step 5: Solve for x
   x = 1,118,280,870,144/664,266
6. Step 6: Final answer
   x = 1,683,483.53