Finding the Third Proportional to 13,217.50 and 17,621

Step by Step Solution

1. Step 1: Write the proportion equation
   13,217.50 : 17,621 = 17,621 : x
2. Step 2: Convert to fraction form
   13,217.50/17,621 = 17,621/x
3. Step 3: Cross multiply
   13,217.50x = 17,621 × 17,621
4. Step 4: Simplify right side
   13,217.50x = 310,499,641
5. Step 5: Solve for x
   x = 310,499,641/13,217.50
6. Step 6: Final answer
   x = 23,491.56