Finding the Third Proportional to 5,978,240 and 8,388,656

Step by Step Solution

1. Step 1: Write the proportion equation
   5,978,240 : 8,388,656 = 8,388,656 : x
2. Step 2: Convert to fraction form
   5,978,240/8,388,656 = 8,388,656/x
3. Step 3: Cross multiply
   5,978,240x = 8,388,656 × 8,388,656
4. Step 4: Simplify right side
   5,978,240x = 70,369,549,486,336
5. Step 5: Solve for x
   x = 70,369,549,486,336/5,978,240
6. Step 6: Final answer
   x = 11,770,947.55