Finding the Third Proportional to 5,709,750 and 8,406,909

Step by Step Solution

1. Step 1: Write the proportion equation
   5,709,750 : 8,406,909 = 8,406,909 : x
2. Step 2: Convert to fraction form
   5,709,750/8,406,909 = 8,406,909/x
3. Step 3: Cross multiply
   5,709,750x = 8,406,909 × 8,406,909
4. Step 4: Simplify right side
   5,709,750x = 70,676,118,934,281
5. Step 5: Solve for x
   x = 70,676,118,934,281/5,709,750
6. Step 6: Final answer
   x = 12,378,145.97