Finding the Third Proportional to 2,289.50 and 3,218

Step by Step Solution

1. Step 1: Write the proportion equation
   2,289.50 : 3,218 = 3,218 : x
2. Step 2: Convert to fraction form
   2,289.50/3,218 = 3,218/x
3. Step 3: Cross multiply
   2,289.50x = 3,218 × 3,218
4. Step 4: Simplify right side
   2,289.50x = 10,355,524
5. Step 5: Solve for x
   x = 10,355,524/2,289.50
6. Step 6: Final answer
   x = 4,523.05