Finding the Third Proportional to 1,420,622 and 3,121,180

Step by Step Solution

1. Step 1: Write the proportion equation
   1,420,622 : 3,121,180 = 3,121,180 : x
2. Step 2: Convert to fraction form
   1,420,622/3,121,180 = 3,121,180/x
3. Step 3: Cross multiply
   1,420,622x = 3,121,180 × 3,121,180
4. Step 4: Simplify right side
   1,420,622x = 9,741,764,592,400
5. Step 5: Solve for x
   x = 9,741,764,592,400/1,420,622
6. Step 6: Final answer
   x = 6,857,393.87