Finding the Third Proportional to 636,662 and 1,378,300

Step by Step Solution

1. Step 1: Write the proportion equation
   636,662 : 1,378,300 = 1,378,300 : x
2. Step 2: Convert to fraction form
   636,662/1,378,300 = 1,378,300/x
3. Step 3: Cross multiply
   636,662x = 1,378,300 × 1,378,300
4. Step 4: Simplify right side
   636,662x = 1,899,710,890,000
5. Step 5: Solve for x
   x = 1,899,710,890,000/636,662
6. Step 6: Final answer
   x = 2,983,860.97