Finding the Fourth Proportional to 12,856.21, 19,286.73 and 5,836.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,856.21 : 19,286.73 = 5,836.72 : x
2. Step 2: Convert to fraction form
   12,856.21/19,286.73 = 5,836.72/x
3. Step 3: Cross multiply
   12,856.21x = 19,286.73 × 5,836.72
4. Step 4: Simplify right side
   12,856.21x = 112,571,242.73
5. Step 5: Solve for x
   x = 112,571,242.73/12,856.21
6. Step 6: Final answer
   x = 8,756.18