Finding the Third Proportional to 11,991.38 and 18,150.75

Step by Step Solution

1. Step 1: Write the proportion equation
   11,991.38 : 18,150.75 = 18,150.75 : x
2. Step 2: Convert to fraction form
   11,991.38/18,150.75 = 18,150.75/x
3. Step 3: Cross multiply
   11,991.38x = 18,150.75 × 18,150.75
4. Step 4: Simplify right side
   11,991.38x = 329,449,725.56
5. Step 5: Solve for x
   x = 329,449,725.56/11,991.38
6. Step 6: Final answer
   x = 27,473.89