Finding the Fourth Proportional to 1,279.82, 1,923.34 and 759.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.82 : 1,923.34 = 759.91 : x
2. Step 2: Convert to fraction form
   1,279.82/1,923.34 = 759.91/x
3. Step 3: Cross multiply
   1,279.82x = 1,923.34 × 759.91
4. Step 4: Simplify right side
   1,279.82x = 1,461,565.30
5. Step 5: Solve for x
   x = 1,461,565.30/1,279.82
6. Step 6: Final answer
   x = 1,142.01