Finding the Third Proportional to 11,990 and 14,150

Step by Step Solution

1. Step 1: Write the proportion equation
   11,990 : 14,150 = 14,150 : x
2. Step 2: Convert to fraction form
   11,990/14,150 = 14,150/x
3. Step 3: Cross multiply
   11,990x = 14,150 × 14,150
4. Step 4: Simplify right side
   11,990x = 200,222,500
5. Step 5: Solve for x
   x = 200,222,500/11,990
6. Step 6: Final answer
   x = 16,699.12