Finding the Third Proportional to 13,720 and 19,600

Step by Step Solution

1. Step 1: Write the proportion equation
   13,720 : 19,600 = 19,600 : x
2. Step 2: Convert to fraction form
   13,720/19,600 = 19,600/x
3. Step 3: Cross multiply
   13,720x = 19,600 × 19,600
4. Step 4: Simplify right side
   13,720x = 384,160,000
5. Step 5: Solve for x
   x = 384,160,000/13,720
6. Step 6: Final answer
   x = 28,000