Finding the Third Proportional to 1,620 and 3,510

Step by Step Solution

1. Step 1: Write the proportion equation
   1,620 : 3,510 = 3,510 : x
2. Step 2: Convert to fraction form
   1,620/3,510 = 3,510/x
3. Step 3: Cross multiply
   1,620x = 3,510 × 3,510
4. Step 4: Simplify right side
   1,620x = 12,320,100
5. Step 5: Solve for x
   x = 12,320,100/1,620
6. Step 6: Final answer
   x = 7,605