Finding the Third Proportional to 6,404,086 and 9,905,384

Step by Step Solution

1. Step 1: Write the proportion equation
   6,404,086 : 9,905,384 = 9,905,384 : x
2. Step 2: Convert to fraction form
   6,404,086/9,905,384 = 9,905,384/x
3. Step 3: Cross multiply
   6,404,086x = 9,905,384 × 9,905,384
4. Step 4: Simplify right side
   6,404,086x = 98,116,632,187,456
5. Step 5: Solve for x
   x = 98,116,632,187,456/6,404,086
6. Step 6: Final answer
   x = 15,320,942.32