Finding the Third Proportional to 4,826,540 and 9,987,148

Step by Step Solution

1. Step 1: Write the proportion equation
   4,826,540 : 9,987,148 = 9,987,148 : x
2. Step 2: Convert to fraction form
   4,826,540/9,987,148 = 9,987,148/x
3. Step 3: Cross multiply
   4,826,540x = 9,987,148 × 9,987,148
4. Step 4: Simplify right side
   4,826,540x = 99,743,125,173,904
5. Step 5: Solve for x
   x = 99,743,125,173,904/4,826,540
6. Step 6: Final answer
   x = 20,665,554.45