Finding the Third Proportional to 2,558,579 and 5,515,718

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558,579 : 5,515,718 = 5,515,718 : x
2. Step 2: Convert to fraction form
   2,558,579/5,515,718 = 5,515,718/x
3. Step 3: Cross multiply
   2,558,579x = 5,515,718 × 5,515,718
4. Step 4: Simplify right side
   2,558,579x = 30,423,145,055,524
5. Step 5: Solve for x
   x = 30,423,145,055,524/2,558,579
6. Step 6: Final answer
   x = 11,890,641.27