Finding the Third Proportional to 5,257 and 10,787

Step by Step Solution

1. Step 1: Write the proportion equation
   5,257 : 10,787 = 10,787 : x
2. Step 2: Convert to fraction form
   5,257/10,787 = 10,787/x
3. Step 3: Cross multiply
   5,257x = 10,787 × 10,787
4. Step 4: Simplify right side
   5,257x = 116,359,369
5. Step 5: Solve for x
   x = 116,359,369/5,257
6. Step 6: Final answer
   x = 22,134.18