Finding the Third Proportional to 642,864 and 1,400,019

Step by Step Solution

1. Step 1: Write the proportion equation
   642,864 : 1,400,019 = 1,400,019 : x
2. Step 2: Convert to fraction form
   642,864/1,400,019 = 1,400,019/x
3. Step 3: Cross multiply
   642,864x = 1,400,019 × 1,400,019
4. Step 4: Simplify right side
   642,864x = 1,960,053,200,361
5. Step 5: Solve for x
   x = 1,960,053,200,361/642,864
6. Step 6: Final answer
   x = 3,048,939.12