Finding the Third Proportional to 687,618 and 1,051,191

Step by Step Solution

1. Step 1: Write the proportion equation
   687,618 : 1,051,191 = 1,051,191 : x
2. Step 2: Convert to fraction form
   687,618/1,051,191 = 1,051,191/x
3. Step 3: Cross multiply
   687,618x = 1,051,191 × 1,051,191
4. Step 4: Simplify right side
   687,618x = 1,105,002,518,481
5. Step 5: Solve for x
   x = 1,105,002,518,481/687,618
6. Step 6: Final answer
   x = 1,607,000.57