Finding the Third Proportional to 5,579,990 and 7,897,863

Step by Step Solution

1. Step 1: Write the proportion equation
   5,579,990 : 7,897,863 = 7,897,863 : x
2. Step 2: Convert to fraction form
   5,579,990/7,897,863 = 7,897,863/x
3. Step 3: Cross multiply
   5,579,990x = 7,897,863 × 7,897,863
4. Step 4: Simplify right side
   5,579,990x = 62,376,239,966,769
5. Step 5: Solve for x
   x = 62,376,239,966,769/5,579,990
6. Step 6: Final answer
   x = 11,178,557.66