Finding the Third Proportional to 5,212 and 10,280

Step by Step Solution

1. Step 1: Write the proportion equation
   5,212 : 10,280 = 10,280 : x
2. Step 2: Convert to fraction form
   5,212/10,280 = 10,280/x
3. Step 3: Cross multiply
   5,212x = 10,280 × 10,280
4. Step 4: Simplify right side
   5,212x = 105,678,400
5. Step 5: Solve for x
   x = 105,678,400/5,212
6. Step 6: Final answer
   x = 20,275.98