Finding the Third Proportional to 636,644 and 1,372,912

Step by Step Solution

1. Step 1: Write the proportion equation
   636,644 : 1,372,912 = 1,372,912 : x
2. Step 2: Convert to fraction form
   636,644/1,372,912 = 1,372,912/x
3. Step 3: Cross multiply
   636,644x = 1,372,912 × 1,372,912
4. Step 4: Simplify right side
   636,644x = 1,884,887,359,744
5. Step 5: Solve for x
   x = 1,884,887,359,744/636,644
6. Step 6: Final answer
   x = 2,960,661.47