Finding the Third Proportional to 11,288 and 12,248

Step by Step Solution

1. Step 1: Write the proportion equation
   11,288 : 12,248 = 12,248 : x
2. Step 2: Convert to fraction form
   11,288/12,248 = 12,248/x
3. Step 3: Cross multiply
   11,288x = 12,248 × 12,248
4. Step 4: Simplify right side
   11,288x = 150,013,504
5. Step 5: Solve for x
   x = 150,013,504/11,288
6. Step 6: Final answer
   x = 13,289.64