Finding the Third Proportional to 18,057.94 and 19,584.28

Step by Step Solution

1. Step 1: Write the proportion equation
   18,057.94 : 19,584.28 = 19,584.28 : x
2. Step 2: Convert to fraction form
   18,057.94/19,584.28 = 19,584.28/x
3. Step 3: Cross multiply
   18,057.94x = 19,584.28 × 19,584.28
4. Step 4: Simplify right side
   18,057.94x = 383,544,072.08
5. Step 5: Solve for x
   x = 383,544,072.08/18,057.94
6. Step 6: Final answer
   x = 21,239.64