Finding the Third Proportional to 9,200 and 13,800

Step by Step Solution

1. Step 1: Write the proportion equation
   9,200 : 13,800 = 13,800 : x
2. Step 2: Convert to fraction form
   9,200/13,800 = 13,800/x
3. Step 3: Cross multiply
   9,200x = 13,800 × 13,800
4. Step 4: Simplify right side
   9,200x = 190,440,000
5. Step 5: Solve for x
   x = 190,440,000/9,200
6. Step 6: Final answer
   x = 20,700