Finding the Third Proportional to 2,589,864 and 5,639,511

Step by Step Solution

1. Step 1: Write the proportion equation
   2,589,864 : 5,639,511 = 5,639,511 : x
2. Step 2: Convert to fraction form
   2,589,864/5,639,511 = 5,639,511/x
3. Step 3: Cross multiply
   2,589,864x = 5,639,511 × 5,639,511
4. Step 4: Simplify right side
   2,589,864x = 31,804,084,319,121
5. Step 5: Solve for x
   x = 31,804,084,319,121/2,589,864
6. Step 6: Final answer
   x = 12,280,214.06