Finding the Fourth Proportional to 851.82, 1,269.72 and 758.80

Step by Step Solution

1. Step 1: Write the proportion equation
   851.82 : 1,269.72 = 758.80 : x
2. Step 2: Convert to fraction form
   851.82/1,269.72 = 758.80/x
3. Step 3: Cross multiply
   851.82x = 1,269.72 × 758.80
4. Step 4: Simplify right side
   851.82x = 963,463.54
5. Step 5: Solve for x
   x = 963,463.54/851.82
6. Step 6: Final answer
   x = 1,131.06