Finding the Third Proportional to 5,709,618 and 8,406,711

Step by Step Solution

1. Step 1: Write the proportion equation
   5,709,618 : 8,406,711 = 8,406,711 : x
2. Step 2: Convert to fraction form
   5,709,618/8,406,711 = 8,406,711/x
3. Step 3: Cross multiply
   5,709,618x = 8,406,711 × 8,406,711
4. Step 4: Simplify right side
   5,709,618x = 70,672,789,837,521
5. Step 5: Solve for x
   x = 70,672,789,837,521/5,709,618
6. Step 6: Final answer
   x = 12,377,849.07