Finding the Third Proportional to 8,309,538 and 12,431,106

Step by Step Solution

1. Step 1: Write the proportion equation
   8,309,538 : 12,431,106 = 12,431,106 : x
2. Step 2: Convert to fraction form
   8,309,538/12,431,106 = 12,431,106/x
3. Step 3: Cross multiply
   8,309,538x = 12,431,106 × 12,431,106
4. Step 4: Simplify right side
   8,309,538x = 154,532,396,383,236
5. Step 5: Solve for x
   x = 154,532,396,383,236/8,309,538
6. Step 6: Final answer
   x = 18,596,990.16