Finding the Third Proportional to 309,852 and 656,904

Step by Step Solution

1. Step 1: Write the proportion equation
   309,852 : 656,904 = 656,904 : x
2. Step 2: Convert to fraction form
   309,852/656,904 = 656,904/x
3. Step 3: Cross multiply
   309,852x = 656,904 × 656,904
4. Step 4: Simplify right side
   309,852x = 431,522,865,216
5. Step 5: Solve for x
   x = 431,522,865,216/309,852
6. Step 6: Final answer
   x = 1,392,674.13