Finding the Third Proportional to 9,981,972 and 20,435,970

Step by Step Solution

1. Step 1: Write the proportion equation
   9,981,972 : 20,435,970 = 20,435,970 : x
2. Step 2: Convert to fraction form
   9,981,972/20,435,970 = 20,435,970/x
3. Step 3: Cross multiply
   9,981,972x = 20,435,970 × 20,435,970
4. Step 4: Simplify right side
   9,981,972x = 417,628,869,840,900
5. Step 5: Solve for x
   x = 417,628,869,840,900/9,981,972
6. Step 6: Final answer
   x = 41,838,313.09