Finding the Third Proportional to 12,189 and 17,817

Step by Step Solution

1. Step 1: Write the proportion equation
   12,189 : 17,817 = 17,817 : x
2. Step 2: Convert to fraction form
   12,189/17,817 = 17,817/x
3. Step 3: Cross multiply
   12,189x = 17,817 × 17,817
4. Step 4: Simplify right side
   12,189x = 317,445,489
5. Step 5: Solve for x
   x = 317,445,489/12,189
6. Step 6: Final answer
   x = 26,043.60