Finding the Fourth Proportional to 1,321.89, 1,982.82 and 552.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321.89 : 1,982.82 = 552.39 : x
2. Step 2: Convert to fraction form
   1,321.89/1,982.82 = 552.39/x
3. Step 3: Cross multiply
   1,321.89x = 1,982.82 × 552.39
4. Step 4: Simplify right side
   1,321.89x = 1,095,289.94
5. Step 5: Solve for x
   x = 1,095,289.94/1,321.89
6. Step 6: Final answer
   x = 828.58