Finding the Third Proportional to 636,880 and 1,396,304

Step by Step Solution

1. Step 1: Write the proportion equation
   636,880 : 1,396,304 = 1,396,304 : x
2. Step 2: Convert to fraction form
   636,880/1,396,304 = 1,396,304/x
3. Step 3: Cross multiply
   636,880x = 1,396,304 × 1,396,304
4. Step 4: Simplify right side
   636,880x = 1,949,664,860,416
5. Step 5: Solve for x
   x = 1,949,664,860,416/636,880
6. Step 6: Final answer
   x = 3,061,275.06