Finding the Fourth Proportional to 1,082.32, 1,493.60 and 616.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.32 : 1,493.60 = 616.56 : x
2. Step 2: Convert to fraction form
   1,082.32/1,493.60 = 616.56/x
3. Step 3: Cross multiply
   1,082.32x = 1,493.60 × 616.56
4. Step 4: Simplify right side
   1,082.32x = 920,894.02
5. Step 5: Solve for x
   x = 920,894.02/1,082.32
6. Step 6: Final answer
   x = 850.85