Finding the Fourth Proportional to 1,082.72, 1,494.16 and 616.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.72 : 1,494.16 = 616.96 : x
2. Step 2: Convert to fraction form
   1,082.72/1,494.16 = 616.96/x
3. Step 3: Cross multiply
   1,082.72x = 1,494.16 × 616.96
4. Step 4: Simplify right side
   1,082.72x = 921,836.95
5. Step 5: Solve for x
   x = 921,836.95/1,082.72
6. Step 6: Final answer
   x = 851.41