Finding the Third Proportional to 309,608 and 632,334

Step by Step Solution

1. Step 1: Write the proportion equation
   309,608 : 632,334 = 632,334 : x
2. Step 2: Convert to fraction form
   309,608/632,334 = 632,334/x
3. Step 3: Cross multiply
   309,608x = 632,334 × 632,334
4. Step 4: Simplify right side
   309,608x = 399,846,287,556
5. Step 5: Solve for x
   x = 399,846,287,556/309,608
6. Step 6: Final answer
   x = 1,291,459.81