Finding the Third Proportional to 2,520,831 and 5,531,478

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520,831 : 5,531,478 = 5,531,478 : x
2. Step 2: Convert to fraction form
   2,520,831/5,531,478 = 5,531,478/x
3. Step 3: Cross multiply
   2,520,831x = 5,531,478 × 5,531,478
4. Step 4: Simplify right side
   2,520,831x = 30,597,248,864,484
5. Step 5: Solve for x
   x = 30,597,248,864,484/2,520,831
6. Step 6: Final answer
   x = 12,137,762.85