Finding the Third Proportional to 2,711,818.50 and 3,970,689

Step by Step Solution

1. Step 1: Write the proportion equation
   2,711,818.50 : 3,970,689 = 3,970,689 : x
2. Step 2: Convert to fraction form
   2,711,818.50/3,970,689 = 3,970,689/x
3. Step 3: Cross multiply
   2,711,818.50x = 3,970,689 × 3,970,689
4. Step 4: Simplify right side
   2,711,818.50x = 15,766,371,134,721
5. Step 5: Solve for x
   x = 15,766,371,134,721/2,711,818.50
6. Step 6: Final answer
   x = 5,813,947.78