Finding the Third Proportional to 5,129 and 10,498

Step by Step Solution

1. Step 1: Write the proportion equation
   5,129 : 10,498 = 10,498 : x
2. Step 2: Convert to fraction form
   5,129/10,498 = 10,498/x
3. Step 3: Cross multiply
   5,129x = 10,498 × 10,498
4. Step 4: Simplify right side
   5,129x = 110,208,004
5. Step 5: Solve for x
   x = 110,208,004/5,129
6. Step 6: Final answer
   x = 21,487.23