Finding the Fourth Proportional to 12,428.37, 18,626.76 and 5,845.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,428.37 : 18,626.76 = 5,845.50 : x
2. Step 2: Convert to fraction form
   12,428.37/18,626.76 = 5,845.50/x
3. Step 3: Cross multiply
   12,428.37x = 18,626.76 × 5,845.50
4. Step 4: Simplify right side
   12,428.37x = 108,882,725.58
5. Step 5: Solve for x
   x = 108,882,725.58/12,428.37
6. Step 6: Final answer
   x = 8,760.82