Finding the Third Proportional to 1,085,821 and 2,315,920

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085,821 : 2,315,920 = 2,315,920 : x
2. Step 2: Convert to fraction form
   1,085,821/2,315,920 = 2,315,920/x
3. Step 3: Cross multiply
   1,085,821x = 2,315,920 × 2,315,920
4. Step 4: Simplify right side
   1,085,821x = 5,363,485,446,400
5. Step 5: Solve for x
   x = 5,363,485,446,400/1,085,821
6. Step 6: Final answer
   x = 4,939,566.88