Finding the Third Proportional to 5,500,661 and 8,261,336

Step by Step Solution

1. Step 1: Write the proportion equation
   5,500,661 : 8,261,336 = 8,261,336 : x
2. Step 2: Convert to fraction form
   5,500,661/8,261,336 = 8,261,336/x
3. Step 3: Cross multiply
   5,500,661x = 8,261,336 × 8,261,336
4. Step 4: Simplify right side
   5,500,661x = 68,249,672,504,896
5. Step 5: Solve for x
   x = 68,249,672,504,896/5,500,661
6. Step 6: Final answer
   x = 12,407,540.20