Finding the Third Proportional to 2,557,021.50 and 5,512,563

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557,021.50 : 5,512,563 = 5,512,563 : x
2. Step 2: Convert to fraction form
   2,557,021.50/5,512,563 = 5,512,563/x
3. Step 3: Cross multiply
   2,557,021.50x = 5,512,563 × 5,512,563
4. Step 4: Simplify right side
   2,557,021.50x = 30,388,350,828,969
5. Step 5: Solve for x
   x = 30,388,350,828,969/2,557,021.50
6. Step 6: Final answer
   x = 11,884,276.62