Finding the Third Proportional to 3,216.75 and 3,520.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,216.75 : 3,520.50 = 3,520.50 : x
2. Step 2: Convert to fraction form
   3,216.75/3,520.50 = 3,520.50/x
3. Step 3: Cross multiply
   3,216.75x = 3,520.50 × 3,520.50
4. Step 4: Simplify right side
   3,216.75x = 12,393,920.25
5. Step 5: Solve for x
   x = 12,393,920.25/3,216.75
6. Step 6: Final answer
   x = 3,852.93