Finding the Third Proportional to 642,789 and 1,411,671

Step by Step Solution

1. Step 1: Write the proportion equation
   642,789 : 1,411,671 = 1,411,671 : x
2. Step 2: Convert to fraction form
   642,789/1,411,671 = 1,411,671/x
3. Step 3: Cross multiply
   642,789x = 1,411,671 × 1,411,671
4. Step 4: Simplify right side
   642,789x = 1,992,815,012,241
5. Step 5: Solve for x
   x = 1,992,815,012,241/642,789
6. Step 6: Final answer
   x = 3,100,263.09