Finding the Third Proportional to 12,172 and 17,430

Step by Step Solution

1. Step 1: Write the proportion equation
   12,172 : 17,430 = 17,430 : x
2. Step 2: Convert to fraction form
   12,172/17,430 = 17,430/x
3. Step 3: Cross multiply
   12,172x = 17,430 × 17,430
4. Step 4: Simplify right side
   12,172x = 303,804,900
5. Step 5: Solve for x
   x = 303,804,900/12,172
6. Step 6: Final answer
   x = 24,959.32