Finding the Fourth Proportional to 1,456.28, 2,009.52 and 866.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.28 : 2,009.52 = 866.72 : x
2. Step 2: Convert to fraction form
   1,456.28/2,009.52 = 866.72/x
3. Step 3: Cross multiply
   1,456.28x = 2,009.52 × 866.72
4. Step 4: Simplify right side
   1,456.28x = 1,741,681.13
5. Step 5: Solve for x
   x = 1,741,681.13/1,456.28
6. Step 6: Final answer
   x = 1,195.98