Finding the Third Proportional to 778,630 and 1,689,452

Step by Step Solution

1. Step 1: Write the proportion equation
   778,630 : 1,689,452 = 1,689,452 : x
2. Step 2: Convert to fraction form
   778,630/1,689,452 = 1,689,452/x
3. Step 3: Cross multiply
   778,630x = 1,689,452 × 1,689,452
4. Step 4: Simplify right side
   778,630x = 2,854,248,060,304
5. Step 5: Solve for x
   x = 2,854,248,060,304/778,630
6. Step 6: Final answer
   x = 3,665,730.91