Finding the Fourth Proportional to 12,960.24, 17,886.84 and 7,370.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,960.24 : 17,886.84 = 7,370.16 : x
2. Step 2: Convert to fraction form
   12,960.24/17,886.84 = 7,370.16/x
3. Step 3: Cross multiply
   12,960.24x = 17,886.84 × 7,370.16
4. Step 4: Simplify right side
   12,960.24x = 131,828,872.69
5. Step 5: Solve for x
   x = 131,828,872.69/12,960.24
6. Step 6: Final answer
   x = 10,171.79