Finding the Third Proportional to 4,826,354 and 9,986,790

Step by Step Solution

1. Step 1: Write the proportion equation
   4,826,354 : 9,986,790 = 9,986,790 : x
2. Step 2: Convert to fraction form
   4,826,354/9,986,790 = 9,986,790/x
3. Step 3: Cross multiply
   4,826,354x = 9,986,790 × 9,986,790
4. Step 4: Simplify right side
   4,826,354x = 99,735,974,504,100
5. Step 5: Solve for x
   x = 99,735,974,504,100/4,826,354
6. Step 6: Final answer
   x = 20,664,869.28