Finding the Third Proportional to 8,309,592 and 12,431,172

Step by Step Solution

1. Step 1: Write the proportion equation
   8,309,592 : 12,431,172 = 12,431,172 : x
2. Step 2: Convert to fraction form
   8,309,592/12,431,172 = 12,431,172/x
3. Step 3: Cross multiply
   8,309,592x = 12,431,172 × 12,431,172
4. Step 4: Simplify right side
   8,309,592x = 154,534,037,293,584
5. Step 5: Solve for x
   x = 154,534,037,293,584/8,309,592
6. Step 6: Final answer
   x = 18,597,066.77