Finding the Fourth Proportional to 1,279.16, 1,765.25 and 755.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.16 : 1,765.25 = 755.18 : x
2. Step 2: Convert to fraction form
   1,279.16/1,765.25 = 755.18/x
3. Step 3: Cross multiply
   1,279.16x = 1,765.25 × 755.18
4. Step 4: Simplify right side
   1,279.16x = 1,333,068.89
5. Step 5: Solve for x
   x = 1,333,068.89/1,279.16
6. Step 6: Final answer
   x = 1,042.15