Finding the Fourth Proportional to 1,053.72, 1,580.51 and 323.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.72 : 1,580.51 = 323.23 : x
2. Step 2: Convert to fraction form
   1,053.72/1,580.51 = 323.23/x
3. Step 3: Cross multiply
   1,053.72x = 1,580.51 × 323.23
4. Step 4: Simplify right side
   1,053.72x = 510,868.25
5. Step 5: Solve for x
   x = 510,868.25/1,053.72
6. Step 6: Final answer
   x = 484.82