Finding the Third Proportional to 5,309,191 and 8,198,490

Step by Step Solution

1. Step 1: Write the proportion equation
   5,309,191 : 8,198,490 = 8,198,490 : x
2. Step 2: Convert to fraction form
   5,309,191/8,198,490 = 8,198,490/x
3. Step 3: Cross multiply
   5,309,191x = 8,198,490 × 8,198,490
4. Step 4: Simplify right side
   5,309,191x = 67,215,238,280,100
5. Step 5: Solve for x
   x = 67,215,238,280,100/5,309,191
6. Step 6: Final answer
   x = 12,660,165.79