Finding the Third Proportional to 4,826,347 and 9,986,778

Step by Step Solution

1. Step 1: Write the proportion equation
   4,826,347 : 9,986,778 = 9,986,778 : x
2. Step 2: Convert to fraction form
   4,826,347/9,986,778 = 9,986,778/x
3. Step 3: Cross multiply
   4,826,347x = 9,986,778 × 9,986,778
4. Step 4: Simplify right side
   4,826,347x = 99,735,734,821,284
5. Step 5: Solve for x
   x = 99,735,734,821,284/4,826,347
6. Step 6: Final answer
   x = 20,664,849.59