Finding the Fourth Proportional to 13,152.38, 18,144.81 and 8,613.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,152.38 : 18,144.81 = 8,613.74 : x
2. Step 2: Convert to fraction form
   13,152.38/18,144.81 = 8,613.74/x
3. Step 3: Cross multiply
   13,152.38x = 18,144.81 × 8,613.74
4. Step 4: Simplify right side
   13,152.38x = 156,294,721.05
5. Step 5: Solve for x
   x = 156,294,721.05/13,152.38
6. Step 6: Final answer
   x = 11,883.38