Finding the Fourth Proportional to 12,866.28, 17,754.52 and 7,200.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,866.28 : 17,754.52 = 7,200.28 : x
2. Step 2: Convert to fraction form
   12,866.28/17,754.52 = 7,200.28/x
3. Step 3: Cross multiply
   12,866.28x = 17,754.52 × 7,200.28
4. Step 4: Simplify right side
   12,866.28x = 127,837,515.27
5. Step 5: Solve for x
   x = 127,837,515.27/12,866.28
6. Step 6: Final answer
   x = 9,935.86