Finding the Fourth Proportional to 1,151.60, 1,589.27 and 679.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.60 : 1,589.27 = 679.77 : x
2. Step 2: Convert to fraction form
   1,151.60/1,589.27 = 679.77/x
3. Step 3: Cross multiply
   1,151.60x = 1,589.27 × 679.77
4. Step 4: Simplify right side
   1,151.60x = 1,080,339.77
5. Step 5: Solve for x
   x = 1,080,339.77/1,151.60
6. Step 6: Final answer
   x = 938.12