Finding the Fourth Proportional to 1,151.40, 1,589.05 and 679.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.40 : 1,589.05 = 679.46 : x
2. Step 2: Convert to fraction form
   1,151.40/1,589.05 = 679.46/x
3. Step 3: Cross multiply
   1,151.40x = 1,589.05 × 679.46
4. Step 4: Simplify right side
   1,151.40x = 1,079,688.82
5. Step 5: Solve for x
   x = 1,079,688.82/1,151.40
6. Step 6: Final answer
   x = 937.72