Finding the Third Proportional to 2,615,454 and 5,631,678

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615,454 : 5,631,678 = 5,631,678 : x
2. Step 2: Convert to fraction form
   2,615,454/5,631,678 = 5,631,678/x
3. Step 3: Cross multiply
   2,615,454x = 5,631,678 × 5,631,678
4. Step 4: Simplify right side
   2,615,454x = 31,715,797,095,684
5. Step 5: Solve for x
   x = 31,715,797,095,684/2,615,454
6. Step 6: Final answer
   x = 12,126,306.60