Finding the Third Proportional to 18,658.69 and 39,423.38

Step by Step Solution

1. Step 1: Write the proportion equation
   18,658.69 : 39,423.38 = 39,423.38 : x
2. Step 2: Convert to fraction form
   18,658.69/39,423.38 = 39,423.38/x
3. Step 3: Cross multiply
   18,658.69x = 39,423.38 × 39,423.38
4. Step 4: Simplify right side
   18,658.69x = 1,554,202,496.39
5. Step 5: Solve for x
   x = 1,554,202,496.39/18,658.69
6. Step 6: Final answer
   x = 83,296.45