Finding the Fourth Proportional to 12,578.82, 18,758.52 and 11,162.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,578.82 : 18,758.52 = 11,162.76 : x
2. Step 2: Convert to fraction form
   12,578.82/18,758.52 = 11,162.76/x
3. Step 3: Cross multiply
   12,578.82x = 18,758.52 × 11,162.76
4. Step 4: Simplify right side
   12,578.82x = 209,396,856.72
5. Step 5: Solve for x
   x = 209,396,856.72/12,578.82
6. Step 6: Final answer
   x = 16,646.78