Finding the Third Proportional to 5,978,264 and 8,388,687

Step by Step Solution

1. Step 1: Write the proportion equation
   5,978,264 : 8,388,687 = 8,388,687 : x
2. Step 2: Convert to fraction form
   5,978,264/8,388,687 = 8,388,687/x
3. Step 3: Cross multiply
   5,978,264x = 8,388,687 × 8,388,687
4. Step 4: Simplify right side
   5,978,264x = 70,370,069,583,969
5. Step 5: Solve for x
   x = 70,370,069,583,969/5,978,264
6. Step 6: Final answer
   x = 11,770,987.29