Finding the Third Proportional to 2,515 and 5,210

Step by Step Solution

1. Step 1: Write the proportion equation
   2,515 : 5,210 = 5,210 : x
2. Step 2: Convert to fraction form
   2,515/5,210 = 5,210/x
3. Step 3: Cross multiply
   2,515x = 5,210 × 5,210
4. Step 4: Simplify right side
   2,515x = 27,144,100
5. Step 5: Solve for x
   x = 27,144,100/2,515
6. Step 6: Final answer
   x = 10,792.88