Finding the Third Proportional to 645,840 and 1,414,800

Step by Step Solution

1. Step 1: Write the proportion equation
   645,840 : 1,414,800 = 1,414,800 : x
2. Step 2: Convert to fraction form
   645,840/1,414,800 = 1,414,800/x
3. Step 3: Cross multiply
   645,840x = 1,414,800 × 1,414,800
4. Step 4: Simplify right side
   645,840x = 2,001,659,040,000
5. Step 5: Solve for x
   x = 2,001,659,040,000/645,840
6. Step 6: Final answer
   x = 3,099,311.04