Finding the Third Proportional to 7,979.40 and 12,747.58

Step by Step Solution

1. Step 1: Write the proportion equation
   7,979.40 : 12,747.58 = 12,747.58 : x
2. Step 2: Convert to fraction form
   7,979.40/12,747.58 = 12,747.58/x
3. Step 3: Cross multiply
   7,979.40x = 12,747.58 × 12,747.58
4. Step 4: Simplify right side
   7,979.40x = 162,500,737.16
5. Step 5: Solve for x
   x = 162,500,737.16/7,979.40
6. Step 6: Final answer
   x = 20,365.03