Finding the Fourth Proportional to 37,143.42, 55,709.46 and 12,186

Step by Step Solution

1. Step 1: Write the proportion equation
   37,143.42 : 55,709.46 = 12,186 : x
2. Step 2: Convert to fraction form
   37,143.42/55,709.46 = 12,186/x
3. Step 3: Cross multiply
   37,143.42x = 55,709.46 × 12,186
4. Step 4: Simplify right side
   37,143.42x = 678,875,479.56
5. Step 5: Solve for x
   x = 678,875,479.56/37,143.42
6. Step 6: Final answer
   x = 18,277.14