Finding the Third Proportional to 8,499,510 and 12,820,410

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499,510 : 12,820,410 = 12,820,410 : x
2. Step 2: Convert to fraction form
   8,499,510/12,820,410 = 12,820,410/x
3. Step 3: Cross multiply
   8,499,510x = 12,820,410 × 12,820,410
4. Step 4: Simplify right side
   8,499,510x = 164,362,912,568,100
5. Step 5: Solve for x
   x = 164,362,912,568,100/8,499,510
6. Step 6: Final answer
   x = 19,337,928.02