Finding the Third Proportional to 12,099 and 13,665

Step by Step Solution

1. Step 1: Write the proportion equation
   12,099 : 13,665 = 13,665 : x
2. Step 2: Convert to fraction form
   12,099/13,665 = 13,665/x
3. Step 3: Cross multiply
   12,099x = 13,665 × 13,665
4. Step 4: Simplify right side
   12,099x = 186,732,225
5. Step 5: Solve for x
   x = 186,732,225/12,099
6. Step 6: Final answer
   x = 15,433.69