Finding the Third Proportional to 2,589,866 and 5,639,515

Step by Step Solution

1. Step 1: Write the proportion equation
   2,589,866 : 5,639,515 = 5,639,515 : x
2. Step 2: Convert to fraction form
   2,589,866/5,639,515 = 5,639,515/x
3. Step 3: Cross multiply
   2,589,866x = 5,639,515 × 5,639,515
4. Step 4: Simplify right side
   2,589,866x = 31,804,129,435,225
5. Step 5: Solve for x
   x = 31,804,129,435,225/2,589,866
6. Step 6: Final answer
   x = 12,280,222.00