Finding the Third Proportional to 8,388 and 13,040.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,388 : 13,040.25 = 13,040.25 : x
2. Step 2: Convert to fraction form
   8,388/13,040.25 = 13,040.25/x
3. Step 3: Cross multiply
   8,388x = 13,040.25 × 13,040.25
4. Step 4: Simplify right side
   8,388x = 170,048,120.06
5. Step 5: Solve for x
   x = 170,048,120.06/8,388
6. Step 6: Final answer
   x = 20,272.78