Finding the Fourth Proportional to 12,444.18, 18,667.89 and 8,223.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,444.18 : 18,667.89 = 8,223.54 : x
2. Step 2: Convert to fraction form
   12,444.18/18,667.89 = 8,223.54/x
3. Step 3: Cross multiply
   12,444.18x = 18,667.89 × 8,223.54
4. Step 4: Simplify right side
   12,444.18x = 153,516,140.13
5. Step 5: Solve for x
   x = 153,516,140.13/12,444.18
6. Step 6: Final answer
   x = 12,336.38