Finding the Fourth Proportional to 20,185.69, 27,856.25 and 11,353.69

Step by Step Solution

1. Step 1: Write the proportion equation
   20,185.69 : 27,856.25 = 11,353.69 : x
2. Step 2: Convert to fraction form
   20,185.69/27,856.25 = 11,353.69/x
3. Step 3: Cross multiply
   20,185.69x = 27,856.25 × 11,353.69
4. Step 4: Simplify right side
   20,185.69x = 316,271,185.81
5. Step 5: Solve for x
   x = 316,271,185.81/20,185.69
6. Step 6: Final answer
   x = 15,668.09