Finding the Fourth Proportional to 1,328.72, 1,833.64 and 739.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,328.72 : 1,833.64 = 739.31 : x
2. Step 2: Convert to fraction form
   1,328.72/1,833.64 = 739.31/x
3. Step 3: Cross multiply
   1,328.72x = 1,833.64 × 739.31
4. Step 4: Simplify right side
   1,328.72x = 1,355,628.39
5. Step 5: Solve for x
   x = 1,355,628.39/1,328.72
6. Step 6: Final answer
   x = 1,020.25