Finding the Fourth Proportional to 1,162.82, 1,605.45 and 721.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.82 : 1,605.45 = 721.37 : x
2. Step 2: Convert to fraction form
   1,162.82/1,605.45 = 721.37/x
3. Step 3: Cross multiply
   1,162.82x = 1,605.45 × 721.37
4. Step 4: Simplify right side
   1,162.82x = 1,158,123.47
5. Step 5: Solve for x
   x = 1,158,123.47/1,162.82
6. Step 6: Final answer
   x = 995.96