Finding the Third Proportional to 11,700.56 and 18,141.75

Step by Step Solution

1. Step 1: Write the proportion equation
   11,700.56 : 18,141.75 = 18,141.75 : x
2. Step 2: Convert to fraction form
   11,700.56/18,141.75 = 18,141.75/x
3. Step 3: Cross multiply
   11,700.56x = 18,141.75 × 18,141.75
4. Step 4: Simplify right side
   11,700.56x = 329,123,093.06
5. Step 5: Solve for x
   x = 329,123,093.06/11,700.56
6. Step 6: Final answer
   x = 28,128.83