Finding the Third Proportional to 2,072,638 and 4,489,340

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072,638 : 4,489,340 = 4,489,340 : x
2. Step 2: Convert to fraction form
   2,072,638/4,489,340 = 4,489,340/x
3. Step 3: Cross multiply
   2,072,638x = 4,489,340 × 4,489,340
4. Step 4: Simplify right side
   2,072,638x = 20,154,173,635,600
5. Step 5: Solve for x
   x = 20,154,173,635,600/2,072,638
6. Step 6: Final answer
   x = 9,723,923.64