Finding the Fourth Proportional to 12,086.82, 18,122.94 and 4,687.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.82 : 18,122.94 = 4,687.47 : x
2. Step 2: Convert to fraction form
   12,086.82/18,122.94 = 4,687.47/x
3. Step 3: Cross multiply
   12,086.82x = 18,122.94 × 4,687.47
4. Step 4: Simplify right side
   12,086.82x = 84,950,737.56
5. Step 5: Solve for x
   x = 84,950,737.56/12,086.82
6. Step 6: Final answer
   x = 7,028.38