Finding the Third Proportional to 2,589,868 and 5,639,520

Step by Step Solution

1. Step 1: Write the proportion equation
   2,589,868 : 5,639,520 = 5,639,520 : x
2. Step 2: Convert to fraction form
   2,589,868/5,639,520 = 5,639,520/x
3. Step 3: Cross multiply
   2,589,868x = 5,639,520 × 5,639,520
4. Step 4: Simplify right side
   2,589,868x = 31,804,185,830,400
5. Step 5: Solve for x
   x = 31,804,185,830,400/2,589,868
6. Step 6: Final answer
   x = 12,280,234.29