Finding the Fourth Proportional to 1,082.82, 1,626.30 and 672.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.82 : 1,626.30 = 672.72 : x
2. Step 2: Convert to fraction form
   1,082.82/1,626.30 = 672.72/x
3. Step 3: Cross multiply
   1,082.82x = 1,626.30 × 672.72
4. Step 4: Simplify right side
   1,082.82x = 1,094,044.54
5. Step 5: Solve for x
   x = 1,094,044.54/1,082.82
6. Step 6: Final answer
   x = 1,010.37