Finding the Third Proportional to 5,340,420 and 8,274,505

Step by Step Solution

1. Step 1: Write the proportion equation
   5,340,420 : 8,274,505 = 8,274,505 : x
2. Step 2: Convert to fraction form
   5,340,420/8,274,505 = 8,274,505/x
3. Step 3: Cross multiply
   5,340,420x = 8,274,505 × 8,274,505
4. Step 4: Simplify right side
   5,340,420x = 68,467,432,995,025
5. Step 5: Solve for x
   x = 68,467,432,995,025/5,340,420
6. Step 6: Final answer
   x = 12,820,608.30