Finding the Fourth Proportional to 12,846.28, 17,728.18 and 7,257.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,846.28 : 17,728.18 = 7,257.16 : x
2. Step 2: Convert to fraction form
   12,846.28/17,728.18 = 7,257.16/x
3. Step 3: Cross multiply
   12,846.28x = 17,728.18 × 7,257.16
4. Step 4: Simplify right side
   12,846.28x = 128,656,238.77
5. Step 5: Solve for x
   x = 128,656,238.77/12,846.28
6. Step 6: Final answer
   x = 10,015.06