Finding the Third Proportional to 5,358 and 10,581

Step by Step Solution

1. Step 1: Write the proportion equation
   5,358 : 10,581 = 10,581 : x
2. Step 2: Convert to fraction form
   5,358/10,581 = 10,581/x
3. Step 3: Cross multiply
   5,358x = 10,581 × 10,581
4. Step 4: Simplify right side
   5,358x = 111,957,561
5. Step 5: Solve for x
   x = 111,957,561/5,358
6. Step 6: Final answer
   x = 20,895.40