Finding the Third Proportional to 10,911 and 12,099

Step by Step Solution

1. Step 1: Write the proportion equation
   10,911 : 12,099 = 12,099 : x
2. Step 2: Convert to fraction form
   10,911/12,099 = 12,099/x
3. Step 3: Cross multiply
   10,911x = 12,099 × 12,099
4. Step 4: Simplify right side
   10,911x = 146,385,801
5. Step 5: Solve for x
   x = 146,385,801/10,911
6. Step 6: Final answer
   x = 13,416.35