Finding the Third Proportional to 4,039,075 and 8,645,540

Step by Step Solution

1. Step 1: Write the proportion equation
   4,039,075 : 8,645,540 = 8,645,540 : x
2. Step 2: Convert to fraction form
   4,039,075/8,645,540 = 8,645,540/x
3. Step 3: Cross multiply
   4,039,075x = 8,645,540 × 8,645,540
4. Step 4: Simplify right side
   4,039,075x = 74,745,361,891,600
5. Step 5: Solve for x
   x = 74,745,361,891,600/4,039,075
6. Step 6: Final answer
   x = 18,505,564.24