Finding the Fourth Proportional to 12,086.73, 18,134.64 and 4,691.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.73 : 18,134.64 = 4,691.61 : x
2. Step 2: Convert to fraction form
   12,086.73/18,134.64 = 4,691.61/x
3. Step 3: Cross multiply
   12,086.73x = 18,134.64 × 4,691.61
4. Step 4: Simplify right side
   12,086.73x = 85,080,658.37
5. Step 5: Solve for x
   x = 85,080,658.37/12,086.73
6. Step 6: Final answer
   x = 7,039.18