Finding the Third Proportional to 2,120,456 and 4,419,760

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120,456 : 4,419,760 = 4,419,760 : x
2. Step 2: Convert to fraction form
   2,120,456/4,419,760 = 4,419,760/x
3. Step 3: Cross multiply
   2,120,456x = 4,419,760 × 4,419,760
4. Step 4: Simplify right side
   2,120,456x = 19,534,278,457,600
5. Step 5: Solve for x
   x = 19,534,278,457,600/2,120,456
6. Step 6: Final answer
   x = 9,212,300.78