Finding the Third Proportional to 642,649 and 1,411,386

Step by Step Solution

1. Step 1: Write the proportion equation
   642,649 : 1,411,386 = 1,411,386 : x
2. Step 2: Convert to fraction form
   642,649/1,411,386 = 1,411,386/x
3. Step 3: Cross multiply
   642,649x = 1,411,386 × 1,411,386
4. Step 4: Simplify right side
   642,649x = 1,992,010,440,996
5. Step 5: Solve for x
   x = 1,992,010,440,996/642,649
6. Step 6: Final answer
   x = 3,099,686.52