Finding the Fourth Proportional to 12,960.56, 19,422.42 and 5,923.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,960.56 : 19,422.42 = 5,923.28 : x
2. Step 2: Convert to fraction form
   12,960.56/19,422.42 = 5,923.28/x
3. Step 3: Cross multiply
   12,960.56x = 19,422.42 × 5,923.28
4. Step 4: Simplify right side
   12,960.56x = 115,044,431.94
5. Step 5: Solve for x
   x = 115,044,431.94/12,960.56
6. Step 6: Final answer
   x = 8,876.50