Finding the Fourth Proportional to 1,082.24, 1,493.88 and 640.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.24 : 1,493.88 = 640.52 : x
2. Step 2: Convert to fraction form
   1,082.24/1,493.88 = 640.52/x
3. Step 3: Cross multiply
   1,082.24x = 1,493.88 × 640.52
4. Step 4: Simplify right side
   1,082.24x = 956,860.02
5. Step 5: Solve for x
   x = 956,860.02/1,082.24
6. Step 6: Final answer
   x = 884.15