Finding the Fourth Proportional to 1,420.82, 1,960.78 and 791.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,420.82 : 1,960.78 = 791.34 : x
2. Step 2: Convert to fraction form
   1,420.82/1,960.78 = 791.34/x
3. Step 3: Cross multiply
   1,420.82x = 1,960.78 × 791.34
4. Step 4: Simplify right side
   1,420.82x = 1,551,643.65
5. Step 5: Solve for x
   x = 1,551,643.65/1,420.82
6. Step 6: Final answer
   x = 1,092.08