Finding the Fourth Proportional to 1,329.56, 1,993.60 and 549.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,329.56 : 1,993.60 = 549.33 : x
2. Step 2: Convert to fraction form
   1,329.56/1,993.60 = 549.33/x
3. Step 3: Cross multiply
   1,329.56x = 1,993.60 × 549.33
4. Step 4: Simplify right side
   1,329.56x = 1,095,142.91
5. Step 5: Solve for x
   x = 1,095,142.91/1,329.56
6. Step 6: Final answer
   x = 823.69