Finding the Third Proportional to 7,989.75 and 17,421.38

Step by Step Solution

1. Step 1: Write the proportion equation
   7,989.75 : 17,421.38 = 17,421.38 : x
2. Step 2: Convert to fraction form
   7,989.75/17,421.38 = 17,421.38/x
3. Step 3: Cross multiply
   7,989.75x = 17,421.38 × 17,421.38
4. Step 4: Simplify right side
   7,989.75x = 303,504,306.89
5. Step 5: Solve for x
   x = 303,504,306.89/7,989.75
6. Step 6: Final answer
   x = 37,986.71