Finding the Third Proportional to 16,185.50 and 21,579

Step by Step Solution

1. Step 1: Write the proportion equation
   16,185.50 : 21,579 = 21,579 : x
2. Step 2: Convert to fraction form
   16,185.50/21,579 = 21,579/x
3. Step 3: Cross multiply
   16,185.50x = 21,579 × 21,579
4. Step 4: Simplify right side
   16,185.50x = 465,653,241
5. Step 5: Solve for x
   x = 465,653,241/16,185.50
6. Step 6: Final answer
   x = 28,769.78