Finding the Third Proportional to 5,187 and 10,482

Step by Step Solution

1. Step 1: Write the proportion equation
   5,187 : 10,482 = 10,482 : x
2. Step 2: Convert to fraction form
   5,187/10,482 = 10,482/x
3. Step 3: Cross multiply
   5,187x = 10,482 × 10,482
4. Step 4: Simplify right side
   5,187x = 109,872,324
5. Step 5: Solve for x
   x = 109,872,324/5,187
6. Step 6: Final answer
   x = 21,182.25