Finding the Fourth Proportional to 2,739.83, 4,109.54 and 791.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,739.83 : 4,109.54 = 791.91 : x
2. Step 2: Convert to fraction form
   2,739.83/4,109.54 = 791.91/x
3. Step 3: Cross multiply
   2,739.83x = 4,109.54 × 791.91
4. Step 4: Simplify right side
   2,739.83x = 3,254,381.86
5. Step 5: Solve for x
   x = 3,254,381.86/2,739.83
6. Step 6: Final answer
   x = 1,187.81