Finding the Fourth Proportional to 12,682.56, 17,480.16 and 9,533.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,682.56 : 17,480.16 = 9,533.28 : x
2. Step 2: Convert to fraction form
   12,682.56/17,480.16 = 9,533.28/x
3. Step 3: Cross multiply
   12,682.56x = 17,480.16 × 9,533.28
4. Step 4: Simplify right side
   12,682.56x = 166,643,259.72
5. Step 5: Solve for x
   x = 166,643,259.72/12,682.56
6. Step 6: Final answer
   x = 13,139.56