Finding the Third Proportional to 664,854 and 1,368,912

Step by Step Solution

1. Step 1: Write the proportion equation
   664,854 : 1,368,912 = 1,368,912 : x
2. Step 2: Convert to fraction form
   664,854/1,368,912 = 1,368,912/x
3. Step 3: Cross multiply
   664,854x = 1,368,912 × 1,368,912
4. Step 4: Simplify right side
   664,854x = 1,873,920,063,744
5. Step 5: Solve for x
   x = 1,873,920,063,744/664,854
6. Step 6: Final answer
   x = 2,818,543.72