Finding the Third Proportional to 2,240 and 5,388

Step by Step Solution

1. Step 1: Write the proportion equation
   2,240 : 5,388 = 5,388 : x
2. Step 2: Convert to fraction form
   2,240/5,388 = 5,388/x
3. Step 3: Cross multiply
   2,240x = 5,388 × 5,388
4. Step 4: Simplify right side
   2,240x = 29,030,544
5. Step 5: Solve for x
   x = 29,030,544/2,240
6. Step 6: Final answer
   x = 12,960.06