Finding the Third Proportional to 424,468 and 636,666

Step by Step Solution

1. Step 1: Write the proportion equation
   424,468 : 636,666 = 636,666 : x
2. Step 2: Convert to fraction form
   424,468/636,666 = 636,666/x
3. Step 3: Cross multiply
   424,468x = 636,666 × 636,666
4. Step 4: Simplify right side
   424,468x = 405,343,595,556
5. Step 5: Solve for x
   x = 405,343,595,556/424,468
6. Step 6: Final answer
   x = 954,945.00