Finding the Third Proportional to 5,187,972 and 8,287,872

Step by Step Solution

1. Step 1: Write the proportion equation
   5,187,972 : 8,287,872 = 8,287,872 : x
2. Step 2: Convert to fraction form
   5,187,972/8,287,872 = 8,287,872/x
3. Step 3: Cross multiply
   5,187,972x = 8,287,872 × 8,287,872
4. Step 4: Simplify right side
   5,187,972x = 68,688,822,288,384
5. Step 5: Solve for x
   x = 68,688,822,288,384/5,187,972
6. Step 6: Final answer
   x = 13,240,014.07