Finding the Third Proportional to 12,391.50 and 18,588.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,391.50 : 18,588.75 = 18,588.75 : x
2. Step 2: Convert to fraction form
   12,391.50/18,588.75 = 18,588.75/x
3. Step 3: Cross multiply
   12,391.50x = 18,588.75 × 18,588.75
4. Step 4: Simplify right side
   12,391.50x = 345,541,626.56
5. Step 5: Solve for x
   x = 345,541,626.56/12,391.50
6. Step 6: Final answer
   x = 27,885.38