Finding the Fourth Proportional to 12,443.76, 18,667.94 and 3,558.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.76 : 18,667.94 = 3,558.72 : x
2. Step 2: Convert to fraction form
   12,443.76/18,667.94 = 3,558.72/x
3. Step 3: Cross multiply
   12,443.76x = 18,667.94 × 3,558.72
4. Step 4: Simplify right side
   12,443.76x = 66,433,953.64
5. Step 5: Solve for x
   x = 66,433,953.64/12,443.76
6. Step 6: Final answer
   x = 5,338.74