Finding the Fourth Proportional to 1,300.72, 1,951.20 and 531.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.72 : 1,951.20 = 531.28 : x
2. Step 2: Convert to fraction form
   1,300.72/1,951.20 = 531.28/x
3. Step 3: Cross multiply
   1,300.72x = 1,951.20 × 531.28
4. Step 4: Simplify right side
   1,300.72x = 1,036,633.54
5. Step 5: Solve for x
   x = 1,036,633.54/1,300.72
6. Step 6: Final answer
   x = 796.97