Finding the Fourth Proportional to 12,891.62, 19,334.41 and 7,271.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,891.62 : 19,334.41 = 7,271.71 : x
2. Step 2: Convert to fraction form
   12,891.62/19,334.41 = 7,271.71/x
3. Step 3: Cross multiply
   12,891.62x = 19,334.41 × 7,271.71
4. Step 4: Simplify right side
   12,891.62x = 140,594,222.54
5. Step 5: Solve for x
   x = 140,594,222.54/12,891.62
6. Step 6: Final answer
   x = 10,905.86