Finding the Third Proportional to 2,589,870 and 5,639,523

Step by Step Solution

1. Step 1: Write the proportion equation
   2,589,870 : 5,639,523 = 5,639,523 : x
2. Step 2: Convert to fraction form
   2,589,870/5,639,523 = 5,639,523/x
3. Step 3: Cross multiply
   2,589,870x = 5,639,523 × 5,639,523
4. Step 4: Simplify right side
   2,589,870x = 31,804,219,667,529
5. Step 5: Solve for x
   x = 31,804,219,667,529/2,589,870
6. Step 6: Final answer
   x = 12,280,237.88