Finding the Third Proportional to 3,280.50 and 4,613.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,280.50 : 4,613.20 = 4,613.20 : x
2. Step 2: Convert to fraction form
   3,280.50/4,613.20 = 4,613.20/x
3. Step 3: Cross multiply
   3,280.50x = 4,613.20 × 4,613.20
4. Step 4: Simplify right side
   3,280.50x = 21,281,643.07
5. Step 5: Solve for x
   x = 21,281,643.07/3,280.50
6. Step 6: Final answer
   x = 6,487.32