Finding the Third Proportional to 12,391.25 and 17,663.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,391.25 : 17,663.25 = 17,663.25 : x
2. Step 2: Convert to fraction form
   12,391.25/17,663.25 = 17,663.25/x
3. Step 3: Cross multiply
   12,391.25x = 17,663.25 × 17,663.25
4. Step 4: Simplify right side
   12,391.25x = 311,990,400.56
5. Step 5: Solve for x
   x = 311,990,400.56/12,391.25
6. Step 6: Final answer
   x = 25,178.28