Finding the Fourth Proportional to 1,151.31, 1,589.02 and 679.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.31 : 1,589.02 = 679.49 : x
2. Step 2: Convert to fraction form
   1,151.31/1,589.02 = 679.49/x
3. Step 3: Cross multiply
   1,151.31x = 1,589.02 × 679.49
4. Step 4: Simplify right side
   1,151.31x = 1,079,719.51
5. Step 5: Solve for x
   x = 1,079,719.51/1,151.31
6. Step 6: Final answer
   x = 937.82