Finding the Third Proportional to 5,978,181 and 8,388,564

Step by Step Solution

1. Step 1: Write the proportion equation
   5,978,181 : 8,388,564 = 8,388,564 : x
2. Step 2: Convert to fraction form
   5,978,181/8,388,564 = 8,388,564/x
3. Step 3: Cross multiply
   5,978,181x = 8,388,564 × 8,388,564
4. Step 4: Simplify right side
   5,978,181x = 70,368,005,982,096
5. Step 5: Solve for x
   x = 70,368,005,982,096/5,978,181
6. Step 6: Final answer
   x = 11,770,805.53