Finding the Third Proportional to 426,240 and 636,441

Step by Step Solution

1. Step 1: Write the proportion equation
   426,240 : 636,441 = 636,441 : x
2. Step 2: Convert to fraction form
   426,240/636,441 = 636,441/x
3. Step 3: Cross multiply
   426,240x = 636,441 × 636,441
4. Step 4: Simplify right side
   426,240x = 405,057,146,481
5. Step 5: Solve for x
   x = 405,057,146,481/426,240
6. Step 6: Final answer
   x = 950,302.99