Finding the Fourth Proportional to 1,105.78, 1,658.60 and 375.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.78 : 1,658.60 = 375.34 : x
2. Step 2: Convert to fraction form
   1,105.78/1,658.60 = 375.34/x
3. Step 3: Cross multiply
   1,105.78x = 1,658.60 × 375.34
4. Step 4: Simplify right side
   1,105.78x = 622,538.92
5. Step 5: Solve for x
   x = 622,538.92/1,105.78
6. Step 6: Final answer
   x = 562.99