Finding the Third Proportional to 687,630 and 1,051,209

Step by Step Solution

1. Step 1: Write the proportion equation
   687,630 : 1,051,209 = 1,051,209 : x
2. Step 2: Convert to fraction form
   687,630/1,051,209 = 1,051,209/x
3. Step 3: Cross multiply
   687,630x = 1,051,209 × 1,051,209
4. Step 4: Simplify right side
   687,630x = 1,105,040,361,681
5. Step 5: Solve for x
   x = 1,105,040,361,681/687,630
6. Step 6: Final answer
   x = 1,607,027.56