Finding the Fourth Proportional to 1,273.82, 1,757.75 and 776.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,273.82 : 1,757.75 = 776.61 : x
2. Step 2: Convert to fraction form
   1,273.82/1,757.75 = 776.61/x
3. Step 3: Cross multiply
   1,273.82x = 1,757.75 × 776.61
4. Step 4: Simplify right side
   1,273.82x = 1,365,082.34
5. Step 5: Solve for x
   x = 1,365,082.34/1,273.82
6. Step 6: Final answer
   x = 1,071.65