Finding the Third Proportional to 1,609,878 and 2,178,621

Step by Step Solution

1. Step 1: Write the proportion equation
   1,609,878 : 2,178,621 = 2,178,621 : x
2. Step 2: Convert to fraction form
   1,609,878/2,178,621 = 2,178,621/x
3. Step 3: Cross multiply
   1,609,878x = 2,178,621 × 2,178,621
4. Step 4: Simplify right side
   1,609,878x = 4,746,389,461,641
5. Step 5: Solve for x
   x = 4,746,389,461,641/1,609,878
6. Step 6: Final answer
   x = 2,948,291.40