Finding the Fourth Proportional to 1,281.76, 1,768.71 and 757.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,281.76 : 1,768.71 = 757.69 : x
2. Step 2: Convert to fraction form
   1,281.76/1,768.71 = 757.69/x
3. Step 3: Cross multiply
   1,281.76x = 1,768.71 × 757.69
4. Step 4: Simplify right side
   1,281.76x = 1,340,133.88
5. Step 5: Solve for x
   x = 1,340,133.88/1,281.76
6. Step 6: Final answer
   x = 1,045.54