Finding the Third Proportional to 5,644,872 and 8,480,040

Step by Step Solution

1. Step 1: Write the proportion equation
   5,644,872 : 8,480,040 = 8,480,040 : x
2. Step 2: Convert to fraction form
   5,644,872/8,480,040 = 8,480,040/x
3. Step 3: Cross multiply
   5,644,872x = 8,480,040 × 8,480,040
4. Step 4: Simplify right side
   5,644,872x = 71,911,078,401,600
5. Step 5: Solve for x
   x = 71,911,078,401,600/5,644,872
6. Step 6: Final answer
   x = 12,739,186.72