Finding the Third Proportional to 3,287.50 and 7,142

Step by Step Solution

1. Step 1: Write the proportion equation
   3,287.50 : 7,142 = 7,142 : x
2. Step 2: Convert to fraction form
   3,287.50/7,142 = 7,142/x
3. Step 3: Cross multiply
   3,287.50x = 7,142 × 7,142
4. Step 4: Simplify right side
   3,287.50x = 51,008,164
5. Step 5: Solve for x
   x = 51,008,164/3,287.50
6. Step 6: Final answer
   x = 15,515.79