Finding the Third Proportional to 426,249 and 636,456

Step by Step Solution

1. Step 1: Write the proportion equation
   426,249 : 636,456 = 636,456 : x
2. Step 2: Convert to fraction form
   426,249/636,456 = 636,456/x
3. Step 3: Cross multiply
   426,249x = 636,456 × 636,456
4. Step 4: Simplify right side
   426,249x = 405,076,239,936
5. Step 5: Solve for x
   x = 405,076,239,936/426,249
6. Step 6: Final answer
   x = 950,327.72