Finding the Third Proportional to 12,099 and 18,499.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,099 : 18,499.50 = 18,499.50 : x
2. Step 2: Convert to fraction form
   12,099/18,499.50 = 18,499.50/x
3. Step 3: Cross multiply
   12,099x = 18,499.50 × 18,499.50
4. Step 4: Simplify right side
   12,099x = 342,231,500.25
5. Step 5: Solve for x
   x = 342,231,500.25/12,099
6. Step 6: Final answer
   x = 28,285.93