Finding the Fourth Proportional to 1,105.38, 1,654.56 and 616.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.38 : 1,654.56 = 616.95 : x
2. Step 2: Convert to fraction form
   1,105.38/1,654.56 = 616.95/x
3. Step 3: Cross multiply
   1,105.38x = 1,654.56 × 616.95
4. Step 4: Simplify right side
   1,105.38x = 1,020,780.79
5. Step 5: Solve for x
   x = 1,020,780.79/1,105.38
6. Step 6: Final answer
   x = 923.47