Finding the Third Proportional to 5,644,080 and 8,518,608

Step by Step Solution

1. Step 1: Write the proportion equation
   5,644,080 : 8,518,608 = 8,518,608 : x
2. Step 2: Convert to fraction form
   5,644,080/8,518,608 = 8,518,608/x
3. Step 3: Cross multiply
   5,644,080x = 8,518,608 × 8,518,608
4. Step 4: Simplify right side
   5,644,080x = 72,566,682,257,664
5. Step 5: Solve for x
   x = 72,566,682,257,664/5,644,080
6. Step 6: Final answer
   x = 12,857,132.12