Finding the Third Proportional to 12,388.50 and 17,660.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,388.50 : 17,660.11 = 17,660.11 : x
2. Step 2: Convert to fraction form
   12,388.50/17,660.11 = 17,660.11/x
3. Step 3: Cross multiply
   12,388.50x = 17,660.11 × 17,660.11
4. Step 4: Simplify right side
   12,388.50x = 311,879,463.14
5. Step 5: Solve for x
   x = 311,879,463.14/12,388.50
6. Step 6: Final answer
   x = 25,174.92