Finding the Third Proportional to 1,813,678 and 3,959,720

Step by Step Solution

1. Step 1: Write the proportion equation
   1,813,678 : 3,959,720 = 3,959,720 : x
2. Step 2: Convert to fraction form
   1,813,678/3,959,720 = 3,959,720/x
3. Step 3: Cross multiply
   1,813,678x = 3,959,720 × 3,959,720
4. Step 4: Simplify right side
   1,813,678x = 15,679,382,478,400
5. Step 5: Solve for x
   x = 15,679,382,478,400/1,813,678
6. Step 6: Final answer
   x = 8,645,075.08