Finding the Third Proportional to 5,477,980 and 8,515,996

Step by Step Solution

1. Step 1: Write the proportion equation
   5,477,980 : 8,515,996 = 8,515,996 : x
2. Step 2: Convert to fraction form
   5,477,980/8,515,996 = 8,515,996/x
3. Step 3: Cross multiply
   5,477,980x = 8,515,996 × 8,515,996
4. Step 4: Simplify right side
   5,477,980x = 72,522,187,872,016
5. Step 5: Solve for x
   x = 72,522,187,872,016/5,477,980
6. Step 6: Final answer
   x = 13,238,855.91