Finding the Third Proportional to 1,609,920 and 2,178,678

Step by Step Solution

1. Step 1: Write the proportion equation
   1,609,920 : 2,178,678 = 2,178,678 : x
2. Step 2: Convert to fraction form
   1,609,920/2,178,678 = 2,178,678/x
3. Step 3: Cross multiply
   1,609,920x = 2,178,678 × 2,178,678
4. Step 4: Simplify right side
   1,609,920x = 4,746,637,827,684
5. Step 5: Solve for x
   x = 4,746,637,827,684/1,609,920
6. Step 6: Final answer
   x = 2,948,368.76