Finding the Third Proportional to 636,280 and 1,363,642

Step by Step Solution

1. Step 1: Write the proportion equation
   636,280 : 1,363,642 = 1,363,642 : x
2. Step 2: Convert to fraction form
   636,280/1,363,642 = 1,363,642/x
3. Step 3: Cross multiply
   636,280x = 1,363,642 × 1,363,642
4. Step 4: Simplify right side
   636,280x = 1,859,519,504,164
5. Step 5: Solve for x
   x = 1,859,519,504,164/636,280
6. Step 6: Final answer
   x = 2,922,486.18