Finding the Third Proportional to 309,610 and 632,336

Step by Step Solution

1. Step 1: Write the proportion equation
   309,610 : 632,336 = 632,336 : x
2. Step 2: Convert to fraction form
   309,610/632,336 = 632,336/x
3. Step 3: Cross multiply
   309,610x = 632,336 × 632,336
4. Step 4: Simplify right side
   309,610x = 399,848,816,896
5. Step 5: Solve for x
   x = 399,848,816,896/309,610
6. Step 6: Final answer
   x = 1,291,459.63