Finding the Third Proportional to 636,912 and 1,396,296

Step by Step Solution

1. Step 1: Write the proportion equation
   636,912 : 1,396,296 = 1,396,296 : x
2. Step 2: Convert to fraction form
   636,912/1,396,296 = 1,396,296/x
3. Step 3: Cross multiply
   636,912x = 1,396,296 × 1,396,296
4. Step 4: Simplify right side
   636,912x = 1,949,642,519,616
5. Step 5: Solve for x
   x = 1,949,642,519,616/636,912
6. Step 6: Final answer
   x = 3,061,086.18