Finding the Third Proportional to 8,242,428 and 12,608,410

Step by Step Solution

1. Step 1: Write the proportion equation
   8,242,428 : 12,608,410 = 12,608,410 : x
2. Step 2: Convert to fraction form
   8,242,428/12,608,410 = 12,608,410/x
3. Step 3: Cross multiply
   8,242,428x = 12,608,410 × 12,608,410
4. Step 4: Simplify right side
   8,242,428x = 158,972,002,728,100
5. Step 5: Solve for x
   x = 158,972,002,728,100/8,242,428
6. Step 6: Final answer
   x = 19,287,035.66