Finding the Third Proportional to 5,420,648 and 7,981,089

Step by Step Solution

1. Step 1: Write the proportion equation
   5,420,648 : 7,981,089 = 7,981,089 : x
2. Step 2: Convert to fraction form
   5,420,648/7,981,089 = 7,981,089/x
3. Step 3: Cross multiply
   5,420,648x = 7,981,089 × 7,981,089
4. Step 4: Simplify right side
   5,420,648x = 63,697,781,625,921
5. Step 5: Solve for x
   x = 63,697,781,625,921/5,420,648
6. Step 6: Final answer
   x = 11,750,953.32