Finding the Third Proportional to 8,309,964 and 12,431,826

Step by Step Solution

1. Step 1: Write the proportion equation
   8,309,964 : 12,431,826 = 12,431,826 : x
2. Step 2: Convert to fraction form
   8,309,964/12,431,826 = 12,431,826/x
3. Step 3: Cross multiply
   8,309,964x = 12,431,826 × 12,431,826
4. Step 4: Simplify right side
   8,309,964x = 154,550,297,694,276
5. Step 5: Solve for x
   x = 154,550,297,694,276/8,309,964
6. Step 6: Final answer
   x = 18,598,191.00