Finding the Fourth Proportional to 12,131.55, 18,199.14 and 4,338.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,131.55 : 18,199.14 = 4,338.54 : x
2. Step 2: Convert to fraction form
   12,131.55/18,199.14 = 4,338.54/x
3. Step 3: Cross multiply
   12,131.55x = 18,199.14 × 4,338.54
4. Step 4: Simplify right side
   12,131.55x = 78,957,696.86
5. Step 5: Solve for x
   x = 78,957,696.86/12,131.55
6. Step 6: Final answer
   x = 6,508.46