Finding the Third Proportional to 17,320 and 18,760

Step by Step Solution

1. Step 1: Write the proportion equation
   17,320 : 18,760 = 18,760 : x
2. Step 2: Convert to fraction form
   17,320/18,760 = 18,760/x
3. Step 3: Cross multiply
   17,320x = 18,760 × 18,760
4. Step 4: Simplify right side
   17,320x = 351,937,600
5. Step 5: Solve for x
   x = 351,937,600/17,320
6. Step 6: Final answer
   x = 20,319.72