Finding the Third Proportional to 7,791 and 12,099

Step by Step Solution

1. Step 1: Write the proportion equation
   7,791 : 12,099 = 12,099 : x
2. Step 2: Convert to fraction form
   7,791/12,099 = 12,099/x
3. Step 3: Cross multiply
   7,791x = 12,099 × 12,099
4. Step 4: Simplify right side
   7,791x = 146,385,801
5. Step 5: Solve for x
   x = 146,385,801/7,791
6. Step 6: Final answer
   x = 18,789.09