Finding the Fourth Proportional to 19,667.50, 27,141.39 and 11,284.78

Step by Step Solution

1. Step 1: Write the proportion equation
   19,667.50 : 27,141.39 = 11,284.78 : x
2. Step 2: Convert to fraction form
   19,667.50/27,141.39 = 11,284.78/x
3. Step 3: Cross multiply
   19,667.50x = 27,141.39 × 11,284.78
4. Step 4: Simplify right side
   19,667.50x = 306,284,615.04
5. Step 5: Solve for x
   x = 306,284,615.04/19,667.50
6. Step 6: Final answer
   x = 15,573.13