Finding the Third Proportional to 2,145,720 and 4,639,896

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145,720 : 4,639,896 = 4,639,896 : x
2. Step 2: Convert to fraction form
   2,145,720/4,639,896 = 4,639,896/x
3. Step 3: Cross multiply
   2,145,720x = 4,639,896 × 4,639,896
4. Step 4: Simplify right side
   2,145,720x = 21,528,634,890,816
5. Step 5: Solve for x
   x = 21,528,634,890,816/2,145,720
6. Step 6: Final answer
   x = 10,033,291.80