Finding the Third Proportional to 13,458.38 and 20,658.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,458.38 : 20,658.25 = 20,658.25 : x
2. Step 2: Convert to fraction form
   13,458.38/20,658.25 = 20,658.25/x
3. Step 3: Cross multiply
   13,458.38x = 20,658.25 × 20,658.25
4. Step 4: Simplify right side
   13,458.38x = 426,763,293.06
5. Step 5: Solve for x
   x = 426,763,293.06/13,458.38
6. Step 6: Final answer
   x = 31,709.87