Finding the Third Proportional to 13,717.69 and 18,520.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,717.69 : 18,520.31 = 18,520.31 : x
2. Step 2: Convert to fraction form
   13,717.69/18,520.31 = 18,520.31/x
3. Step 3: Cross multiply
   13,717.69x = 18,520.31 × 18,520.31
4. Step 4: Simplify right side
   13,717.69x = 343,001,975.10
5. Step 5: Solve for x
   x = 343,001,975.10/13,717.69
6. Step 6: Final answer
   x = 25,004.36