Finding the Third Proportional to 5,261 and 10,258

Step by Step Solution

1. Step 1: Write the proportion equation
   5,261 : 10,258 = 10,258 : x
2. Step 2: Convert to fraction form
   5,261/10,258 = 10,258/x
3. Step 3: Cross multiply
   5,261x = 10,258 × 10,258
4. Step 4: Simplify right side
   5,261x = 105,226,564
5. Step 5: Solve for x
   x = 105,226,564/5,261
6. Step 6: Final answer
   x = 20,001.25