Finding the Fourth Proportional to 1,321.88, 1,982.83 and 541.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321.88 : 1,982.83 = 541.68 : x
2. Step 2: Convert to fraction form
   1,321.88/1,982.83 = 541.68/x
3. Step 3: Cross multiply
   1,321.88x = 1,982.83 × 541.68
4. Step 4: Simplify right side
   1,321.88x = 1,074,049.89
5. Step 5: Solve for x
   x = 1,074,049.89/1,321.88
6. Step 6: Final answer
   x = 812.52