Finding the Third Proportional to 8,581,536 and 12,723,792

Step by Step Solution

1. Step 1: Write the proportion equation
   8,581,536 : 12,723,792 = 12,723,792 : x
2. Step 2: Convert to fraction form
   8,581,536/12,723,792 = 12,723,792/x
3. Step 3: Cross multiply
   8,581,536x = 12,723,792 × 12,723,792
4. Step 4: Simplify right side
   8,581,536x = 161,894,882,859,264
5. Step 5: Solve for x
   x = 161,894,882,859,264/8,581,536
6. Step 6: Final answer
   x = 18,865,490.15