Finding the Fourth Proportional to 1,054.10, 1,581.33 and 360.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.10 : 1,581.33 = 360.75 : x
2. Step 2: Convert to fraction form
   1,054.10/1,581.33 = 360.75/x
3. Step 3: Cross multiply
   1,054.10x = 1,581.33 × 360.75
4. Step 4: Simplify right side
   1,054.10x = 570,456.89
5. Step 5: Solve for x
   x = 570,456.89/1,054.10
6. Step 6: Final answer
   x = 541.18