Finding the Fourth Proportional to 1,321.33, 1,983.23 and 672.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321.33 : 1,983.23 = 672.52 : x
2. Step 2: Convert to fraction form
   1,321.33/1,983.23 = 672.52/x
3. Step 3: Cross multiply
   1,321.33x = 1,983.23 × 672.52
4. Step 4: Simplify right side
   1,321.33x = 1,333,761.84
5. Step 5: Solve for x
   x = 1,333,761.84/1,321.33
6. Step 6: Final answer
   x = 1,009.41