Finding the Third Proportional to 13,170 and 20,850

Step by Step Solution

1. Step 1: Write the proportion equation
   13,170 : 20,850 = 20,850 : x
2. Step 2: Convert to fraction form
   13,170/20,850 = 20,850/x
3. Step 3: Cross multiply
   13,170x = 20,850 × 20,850
4. Step 4: Simplify right side
   13,170x = 434,722,500
5. Step 5: Solve for x
   x = 434,722,500/13,170
6. Step 6: Final answer
   x = 33,008.54