Finding the Third Proportional to 5,309,109 and 8,198,361

Step by Step Solution

1. Step 1: Write the proportion equation
   5,309,109 : 8,198,361 = 8,198,361 : x
2. Step 2: Convert to fraction form
   5,309,109/8,198,361 = 8,198,361/x
3. Step 3: Cross multiply
   5,309,109x = 8,198,361 × 8,198,361
4. Step 4: Simplify right side
   5,309,109x = 67,213,123,086,321
5. Step 5: Solve for x
   x = 67,213,123,086,321/5,309,109
6. Step 6: Final answer
   x = 12,659,962.92