Finding the Third Proportional to 1,590 and 1,590

Step by Step Solution

1. Step 1: Write the proportion equation
   1,590 : 1,590 = 1,590 : x
2. Step 2: Convert to fraction form
   1,590/1,590 = 1,590/x
3. Step 3: Cross multiply
   1,590x = 1,590 × 1,590
4. Step 4: Simplify right side
   1,590x = 2,528,100
5. Step 5: Solve for x
   x = 2,528,100/1,590
6. Step 6: Final answer
   x = 1,590