Finding the Third Proportional to 8,242,403 and 12,608,387

Step by Step Solution

1. Step 1: Write the proportion equation
   8,242,403 : 12,608,387 = 12,608,387 : x
2. Step 2: Convert to fraction form
   8,242,403/12,608,387 = 12,608,387/x
3. Step 3: Cross multiply
   8,242,403x = 12,608,387 × 12,608,387
4. Step 4: Simplify right side
   8,242,403x = 158,971,422,741,769
5. Step 5: Solve for x
   x = 158,971,422,741,769/8,242,403
6. Step 6: Final answer
   x = 19,287,023.79