Finding the Third Proportional to 687,635 and 1,051,221

Step by Step Solution

1. Step 1: Write the proportion equation
   687,635 : 1,051,221 = 1,051,221 : x
2. Step 2: Convert to fraction form
   687,635/1,051,221 = 1,051,221/x
3. Step 3: Cross multiply
   687,635x = 1,051,221 × 1,051,221
4. Step 4: Simplify right side
   687,635x = 1,105,065,590,841
5. Step 5: Solve for x
   x = 1,105,065,590,841/687,635
6. Step 6: Final answer
   x = 1,607,052.57