Finding the Third Proportional to 11,238.75 and 12,286.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,238.75 : 12,286.69 = 12,286.69 : x
2. Step 2: Convert to fraction form
   11,238.75/12,286.69 = 12,286.69/x
3. Step 3: Cross multiply
   11,238.75x = 12,286.69 × 12,286.69
4. Step 4: Simplify right side
   11,238.75x = 150,962,689.72
5. Step 5: Solve for x
   x = 150,962,689.72/11,238.75
6. Step 6: Final answer
   x = 13,432.34