Finding the Fourth Proportional to 1,082.64, 1,493.80 and 616.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.64 : 1,493.80 = 616.72 : x
2. Step 2: Convert to fraction form
   1,082.64/1,493.80 = 616.72/x
3. Step 3: Cross multiply
   1,082.64x = 1,493.80 × 616.72
4. Step 4: Simplify right side
   1,082.64x = 921,256.34
5. Step 5: Solve for x
   x = 921,256.34/1,082.64
6. Step 6: Final answer
   x = 850.94