Finding the Third Proportional to 642,914 and 1,400,086

Step by Step Solution

1. Step 1: Write the proportion equation
   642,914 : 1,400,086 = 1,400,086 : x
2. Step 2: Convert to fraction form
   642,914/1,400,086 = 1,400,086/x
3. Step 3: Cross multiply
   642,914x = 1,400,086 × 1,400,086
4. Step 4: Simplify right side
   642,914x = 1,960,240,807,396
5. Step 5: Solve for x
   x = 1,960,240,807,396/642,914
6. Step 6: Final answer
   x = 3,048,993.81