Finding the Third Proportional to 3,090 and 3,090

Step by Step Solution

1. Step 1: Write the proportion equation
   3,090 : 3,090 = 3,090 : x
2. Step 2: Convert to fraction form
   3,090/3,090 = 3,090/x
3. Step 3: Cross multiply
   3,090x = 3,090 × 3,090
4. Step 4: Simplify right side
   3,090x = 9,548,100
5. Step 5: Solve for x
   x = 9,548,100/3,090
6. Step 6: Final answer
   x = 3,090