Finding the Third Proportional to 5,290,966 and 7,915,855

Step by Step Solution

1. Step 1: Write the proportion equation
   5,290,966 : 7,915,855 = 7,915,855 : x
2. Step 2: Convert to fraction form
   5,290,966/7,915,855 = 7,915,855/x
3. Step 3: Cross multiply
   5,290,966x = 7,915,855 × 7,915,855
4. Step 4: Simplify right side
   5,290,966x = 62,660,760,381,025
5. Step 5: Solve for x
   x = 62,660,760,381,025/5,290,966
6. Step 6: Final answer
   x = 11,842,971.66