Finding the Fourth Proportional to 12,665.28, 17,481.48 and 7,288.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,665.28 : 17,481.48 = 7,288.32 : x
2. Step 2: Convert to fraction form
   12,665.28/17,481.48 = 7,288.32/x
3. Step 3: Cross multiply
   12,665.28x = 17,481.48 × 7,288.32
4. Step 4: Simplify right side
   12,665.28x = 127,410,620.31
5. Step 5: Solve for x
   x = 127,410,620.31/12,665.28
6. Step 6: Final answer
   x = 10,059.83