Finding the Third Proportional to 8,049.38 and 12,990.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,049.38 : 12,990.38 = 12,990.38 : x
2. Step 2: Convert to fraction form
   8,049.38/12,990.38 = 12,990.38/x
3. Step 3: Cross multiply
   8,049.38x = 12,990.38 × 12,990.38
4. Step 4: Simplify right side
   8,049.38x = 168,749,842.64
5. Step 5: Solve for x
   x = 168,749,842.64/8,049.38
6. Step 6: Final answer
   x = 20,964.34