Finding the Fourth Proportional to 1,003.57, 1,382.97 and 723.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.57 : 1,382.97 = 723.31 : x
2. Step 2: Convert to fraction form
   1,003.57/1,382.97 = 723.31/x
3. Step 3: Cross multiply
   1,003.57x = 1,382.97 × 723.31
4. Step 4: Simplify right side
   1,003.57x = 1,000,316.03
5. Step 5: Solve for x
   x = 1,000,316.03/1,003.57
6. Step 6: Final answer
   x = 996.76