Finding the Fourth Proportional to 1,105.57, 1,658.63 and 375.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.57 : 1,658.63 = 375.15 : x
2. Step 2: Convert to fraction form
   1,105.57/1,658.63 = 375.15/x
3. Step 3: Cross multiply
   1,105.57x = 1,658.63 × 375.15
4. Step 4: Simplify right side
   1,105.57x = 622,235.04
5. Step 5: Solve for x
   x = 622,235.04/1,105.57
6. Step 6: Final answer
   x = 562.82