Finding the Third Proportional to 13,231.50 and 17,638.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,231.50 : 17,638.50 = 17,638.50 : x
2. Step 2: Convert to fraction form
   13,231.50/17,638.50 = 17,638.50/x
3. Step 3: Cross multiply
   13,231.50x = 17,638.50 × 17,638.50
4. Step 4: Simplify right side
   13,231.50x = 311,116,682.25
5. Step 5: Solve for x
   x = 311,116,682.25/13,231.50
6. Step 6: Final answer
   x = 23,513.33