Finding the Fourth Proportional to 12,086.42, 18,127.46 and 7,690.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.42 : 18,127.46 = 7,690.82 : x
2. Step 2: Convert to fraction form
   12,086.42/18,127.46 = 7,690.82/x
3. Step 3: Cross multiply
   12,086.42x = 18,127.46 × 7,690.82
4. Step 4: Simplify right side
   12,086.42x = 139,414,960.51
5. Step 5: Solve for x
   x = 139,414,960.51/12,086.42
6. Step 6: Final answer
   x = 11,534.85