Finding the Fourth Proportional to 12,189.58, 18,278.61 and 5,613.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,189.58 : 18,278.61 = 5,613.82 : x
2. Step 2: Convert to fraction form
   12,189.58/18,278.61 = 5,613.82/x
3. Step 3: Cross multiply
   12,189.58x = 18,278.61 × 5,613.82
4. Step 4: Simplify right side
   12,189.58x = 102,612,826.39
5. Step 5: Solve for x
   x = 102,612,826.39/12,189.58
6. Step 6: Final answer
   x = 8,418.08