Finding the Fourth Proportional to 1,323.83, 1,986.55 and 544.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,323.83 : 1,986.55 = 544.20 : x
2. Step 2: Convert to fraction form
   1,323.83/1,986.55 = 544.20/x
3. Step 3: Cross multiply
   1,323.83x = 1,986.55 × 544.20
4. Step 4: Simplify right side
   1,323.83x = 1,081,079.15
5. Step 5: Solve for x
   x = 1,081,079.15/1,323.83
6. Step 6: Final answer
   x = 816.63