Finding the Third Proportional to 472,714 and 636,892

Step by Step Solution

1. Step 1: Write the proportion equation
   472,714 : 636,892 = 636,892 : x
2. Step 2: Convert to fraction form
   472,714/636,892 = 636,892/x
3. Step 3: Cross multiply
   472,714x = 636,892 × 636,892
4. Step 4: Simplify right side
   472,714x = 405,631,419,664
5. Step 5: Solve for x
   x = 405,631,419,664/472,714
6. Step 6: Final answer
   x = 858,090.56