Finding the Third Proportional to 309,610 and 632,338

Step by Step Solution

1. Step 1: Write the proportion equation
   309,610 : 632,338 = 632,338 : x
2. Step 2: Convert to fraction form
   309,610/632,338 = 632,338/x
3. Step 3: Cross multiply
   309,610x = 632,338 × 632,338
4. Step 4: Simplify right side
   309,610x = 399,851,346,244
5. Step 5: Solve for x
   x = 399,851,346,244/309,610
6. Step 6: Final answer
   x = 1,291,467.80