Finding the Third Proportional to 13,717.69 and 20,518.03

Step by Step Solution

1. Step 1: Write the proportion equation
   13,717.69 : 20,518.03 = 20,518.03 : x
2. Step 2: Convert to fraction form
   13,717.69/20,518.03 = 20,518.03/x
3. Step 3: Cross multiply
   13,717.69x = 20,518.03 × 20,518.03
4. Step 4: Simplify right side
   13,717.69x = 420,989,606.38
5. Step 5: Solve for x
   x = 420,989,606.38/13,717.69
6. Step 6: Final answer
   x = 30,689.55