Finding the Third Proportional to 13,216 and 19,960

Step by Step Solution

1. Step 1: Write the proportion equation
   13,216 : 19,960 = 19,960 : x
2. Step 2: Convert to fraction form
   13,216/19,960 = 19,960/x
3. Step 3: Cross multiply
   13,216x = 19,960 × 19,960
4. Step 4: Simplify right side
   13,216x = 398,401,600
5. Step 5: Solve for x
   x = 398,401,600/13,216
6. Step 6: Final answer
   x = 30,145.40