Finding the Fourth Proportional to 1,103.38, 1,654.71 and 372.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.38 : 1,654.71 = 372.78 : x
2. Step 2: Convert to fraction form
   1,103.38/1,654.71 = 372.78/x
3. Step 3: Cross multiply
   1,103.38x = 1,654.71 × 372.78
4. Step 4: Simplify right side
   1,103.38x = 616,842.79
5. Step 5: Solve for x
   x = 616,842.79/1,103.38
6. Step 6: Final answer
   x = 559.05