Finding the Third Proportional to 3,975,555 and 8,580,582

Step by Step Solution

1. Step 1: Write the proportion equation
   3,975,555 : 8,580,582 = 8,580,582 : x
2. Step 2: Convert to fraction form
   3,975,555/8,580,582 = 8,580,582/x
3. Step 3: Cross multiply
   3,975,555x = 8,580,582 × 8,580,582
4. Step 4: Simplify right side
   3,975,555x = 73,626,387,458,724
5. Step 5: Solve for x
   x = 73,626,387,458,724/3,975,555
6. Step 6: Final answer
   x = 18,519,775.84