Finding the Fourth Proportional to 1,151.82, 1,589.71 and 679.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.82 : 1,589.71 = 679.99 : x
2. Step 2: Convert to fraction form
   1,151.82/1,589.71 = 679.99/x
3. Step 3: Cross multiply
   1,151.82x = 1,589.71 × 679.99
4. Step 4: Simplify right side
   1,151.82x = 1,080,986.90
5. Step 5: Solve for x
   x = 1,080,986.90/1,151.82
6. Step 6: Final answer
   x = 938.51