Finding the Third Proportional to 21,720,612 and 31,870,866

Step by Step Solution

1. Step 1: Write the proportion equation
   21,720,612 : 31,870,866 = 31,870,866 : x
2. Step 2: Convert to fraction form
   21,720,612/31,870,866 = 31,870,866/x
3. Step 3: Cross multiply
   21,720,612x = 31,870,866 × 31,870,866
4. Step 4: Simplify right side
   21,720,612x = 1,015,752,099,589,956
5. Step 5: Solve for x
   x = 1,015,752,099,589,956/21,720,612
6. Step 6: Final answer
   x = 46,764,432.77