Finding the Fourth Proportional to 1,279.11, 1,757.52 and 1,016.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.11 : 1,757.52 = 1,016.67 : x
2. Step 2: Convert to fraction form
   1,279.11/1,757.52 = 1,016.67/x
3. Step 3: Cross multiply
   1,279.11x = 1,757.52 × 1,016.67
4. Step 4: Simplify right side
   1,279.11x = 1,786,820.40
5. Step 5: Solve for x
   x = 1,786,820.40/1,279.11
6. Step 6: Final answer
   x = 1,396.92