Finding the Fourth Proportional to 1,103.59, 1,655.18 and 323.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.59 : 1,655.18 = 323.63 : x
2. Step 2: Convert to fraction form
   1,103.59/1,655.18 = 323.63/x
3. Step 3: Cross multiply
   1,103.59x = 1,655.18 × 323.63
4. Step 4: Simplify right side
   1,103.59x = 535,662.52
5. Step 5: Solve for x
   x = 535,662.52/1,103.59
6. Step 6: Final answer
   x = 485.38