Finding the Fourth Proportional to 12,863.73, 19,327.89 and 8,185.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,863.73 : 19,327.89 = 8,185.78 : x
2. Step 2: Convert to fraction form
   12,863.73/19,327.89 = 8,185.78/x
3. Step 3: Cross multiply
   12,863.73x = 19,327.89 × 8,185.78
4. Step 4: Simplify right side
   12,863.73x = 158,213,758.76
5. Step 5: Solve for x
   x = 158,213,758.76/12,863.73
6. Step 6: Final answer
   x = 12,299.21