Finding the Fourth Proportional to 1,151.69, 1,588.96 and 679.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.69 : 1,588.96 = 679.74 : x
2. Step 2: Convert to fraction form
   1,151.69/1,588.96 = 679.74/x
3. Step 3: Cross multiply
   1,151.69x = 1,588.96 × 679.74
4. Step 4: Simplify right side
   1,151.69x = 1,080,088.92
5. Step 5: Solve for x
   x = 1,080,088.92/1,151.69
6. Step 6: Final answer
   x = 937.83