Finding the Fourth Proportional to 20,173, 27,836.56 and 12,216.48

Step by Step Solution

1. Step 1: Write the proportion equation
   20,173 : 27,836.56 = 12,216.48 : x
2. Step 2: Convert to fraction form
   20,173/27,836.56 = 12,216.48/x
3. Step 3: Cross multiply
   20,173x = 27,836.56 × 12,216.48
4. Step 4: Simplify right side
   20,173x = 340,064,778.51
5. Step 5: Solve for x
   x = 340,064,778.51/20,173
6. Step 6: Final answer
   x = 16,857.42