Finding the Third Proportional to 11,990 and 17,551

Step by Step Solution

1. Step 1: Write the proportion equation
   11,990 : 17,551 = 17,551 : x
2. Step 2: Convert to fraction form
   11,990/17,551 = 17,551/x
3. Step 3: Cross multiply
   11,990x = 17,551 × 17,551
4. Step 4: Simplify right side
   11,990x = 308,037,601
5. Step 5: Solve for x
   x = 308,037,601/11,990
6. Step 6: Final answer
   x = 25,691.21