Finding the Fourth Proportional to 12,954.89, 19,433.61 and 5,161.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,954.89 : 19,433.61 = 5,161.88 : x
2. Step 2: Convert to fraction form
   12,954.89/19,433.61 = 5,161.88/x
3. Step 3: Cross multiply
   12,954.89x = 19,433.61 × 5,161.88
4. Step 4: Simplify right side
   12,954.89x = 100,313,865.62
5. Step 5: Solve for x
   x = 100,313,865.62/12,954.89
6. Step 6: Final answer
   x = 7,743.32