Finding the Third Proportional to 2,121,861 and 4,341,759

Step by Step Solution

1. Step 1: Write the proportion equation
   2,121,861 : 4,341,759 = 4,341,759 : x
2. Step 2: Convert to fraction form
   2,121,861/4,341,759 = 4,341,759/x
3. Step 3: Cross multiply
   2,121,861x = 4,341,759 × 4,341,759
4. Step 4: Simplify right side
   2,121,861x = 18,850,871,214,081
5. Step 5: Solve for x
   x = 18,850,871,214,081/2,121,861
6. Step 6: Final answer
   x = 8,884,121.63