Finding the Third Proportional to 8,309,834 and 12,519,426

Step by Step Solution

1. Step 1: Write the proportion equation
   8,309,834 : 12,519,426 = 12,519,426 : x
2. Step 2: Convert to fraction form
   8,309,834/12,519,426 = 12,519,426/x
3. Step 3: Cross multiply
   8,309,834x = 12,519,426 × 12,519,426
4. Step 4: Simplify right side
   8,309,834x = 156,736,027,369,476
5. Step 5: Solve for x
   x = 156,736,027,369,476/8,309,834
6. Step 6: Final answer
   x = 18,861,511.24