Finding the Third Proportional to 5,978,266 and 8,388,690

Step by Step Solution

1. Step 1: Write the proportion equation
   5,978,266 : 8,388,690 = 8,388,690 : x
2. Step 2: Convert to fraction form
   5,978,266/8,388,690 = 8,388,690/x
3. Step 3: Cross multiply
   5,978,266x = 8,388,690 × 8,388,690
4. Step 4: Simplify right side
   5,978,266x = 70,370,119,916,100
5. Step 5: Solve for x
   x = 70,370,119,916,100/5,978,266
6. Step 6: Final answer
   x = 11,770,991.78