Finding the Fourth Proportional to 12,185.46, 16,818.49 and 7,150.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,185.46 : 16,818.49 = 7,150.81 : x
2. Step 2: Convert to fraction form
   12,185.46/16,818.49 = 7,150.81/x
3. Step 3: Cross multiply
   12,185.46x = 16,818.49 × 7,150.81
4. Step 4: Simplify right side
   12,185.46x = 120,265,737.38
5. Step 5: Solve for x
   x = 120,265,737.38/12,185.46
6. Step 6: Final answer
   x = 9,869.61