Finding the Fourth Proportional to 12,143.61, 16,786.71 and 12,031.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,143.61 : 16,786.71 = 12,031.83 : x
2. Step 2: Convert to fraction form
   12,143.61/16,786.71 = 12,031.83/x
3. Step 3: Cross multiply
   12,143.61x = 16,786.71 × 12,031.83
4. Step 4: Simplify right side
   12,143.61x = 201,974,840.98
5. Step 5: Solve for x
   x = 201,974,840.98/12,143.61
6. Step 6: Final answer
   x = 16,632.19