Finding the Third Proportional to 2,515,585 and 5,431,631

Step by Step Solution

1. Step 1: Write the proportion equation
   2,515,585 : 5,431,631 = 5,431,631 : x
2. Step 2: Convert to fraction form
   2,515,585/5,431,631 = 5,431,631/x
3. Step 3: Cross multiply
   2,515,585x = 5,431,631 × 5,431,631
4. Step 4: Simplify right side
   2,515,585x = 29,502,615,320,161
5. Step 5: Solve for x
   x = 29,502,615,320,161/2,515,585
6. Step 6: Final answer
   x = 11,727,934.19