Finding the Fourth Proportional to 1,420.82, 1,961.04 and 791.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,420.82 : 1,961.04 = 791.56 : x
2. Step 2: Convert to fraction form
   1,420.82/1,961.04 = 791.56/x
3. Step 3: Cross multiply
   1,420.82x = 1,961.04 × 791.56
4. Step 4: Simplify right side
   1,420.82x = 1,552,280.82
5. Step 5: Solve for x
   x = 1,552,280.82/1,420.82
6. Step 6: Final answer
   x = 1,092.52