Finding the Third Proportional to 3,580 and 3,580

Step by Step Solution

1. Step 1: Write the proportion equation
   3,580 : 3,580 = 3,580 : x
2. Step 2: Convert to fraction form
   3,580/3,580 = 3,580/x
3. Step 3: Cross multiply
   3,580x = 3,580 × 3,580
4. Step 4: Simplify right side
   3,580x = 12,816,400
5. Step 5: Solve for x
   x = 12,816,400/3,580
6. Step 6: Final answer
   x = 3,580