Finding the Fourth Proportional to 12,185.96, 18,286.46 and 4,789.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,185.96 : 18,286.46 = 4,789.12 : x
2. Step 2: Convert to fraction form
   12,185.96/18,286.46 = 4,789.12/x
3. Step 3: Cross multiply
   12,185.96x = 18,286.46 × 4,789.12
4. Step 4: Simplify right side
   12,185.96x = 87,576,051.32
5. Step 5: Solve for x
   x = 87,576,051.32/12,185.96
6. Step 6: Final answer
   x = 7,186.64