Finding the Fourth Proportional to 18,826.38, 28,238.72 and 8,293.58

Step by Step Solution

1. Step 1: Write the proportion equation
   18,826.38 : 28,238.72 = 8,293.58 : x
2. Step 2: Convert to fraction form
   18,826.38/28,238.72 = 8,293.58/x
3. Step 3: Cross multiply
   18,826.38x = 28,238.72 × 8,293.58
4. Step 4: Simplify right side
   18,826.38x = 234,200,112.55
5. Step 5: Solve for x
   x = 234,200,112.55/18,826.38
6. Step 6: Final answer
   x = 12,440.00