Finding the Fourth Proportional to 1,053.55, 1,580.22 and 323.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.55 : 1,580.22 = 323.06 : x
2. Step 2: Convert to fraction form
   1,053.55/1,580.22 = 323.06/x
3. Step 3: Cross multiply
   1,053.55x = 1,580.22 × 323.06
4. Step 4: Simplify right side
   1,053.55x = 510,509.82
5. Step 5: Solve for x
   x = 510,509.82/1,053.55
6. Step 6: Final answer
   x = 484.56