Finding the Third Proportional to 7,992 and 12,099.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,992 : 12,099.50 = 12,099.50 : x
2. Step 2: Convert to fraction form
   7,992/12,099.50 = 12,099.50/x
3. Step 3: Cross multiply
   7,992x = 12,099.50 × 12,099.50
4. Step 4: Simplify right side
   7,992x = 146,397,900.25
5. Step 5: Solve for x
   x = 146,397,900.25/7,992
6. Step 6: Final answer
   x = 18,318.06