Finding the Fourth Proportional to 2,943.45, 4,390.38 and 2,739.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,943.45 : 4,390.38 = 2,739.33 : x
2. Step 2: Convert to fraction form
   2,943.45/4,390.38 = 2,739.33/x
3. Step 3: Cross multiply
   2,943.45x = 4,390.38 × 2,739.33
4. Step 4: Simplify right side
   2,943.45x = 12,026,699.65
5. Step 5: Solve for x
   x = 12,026,699.65/2,943.45
6. Step 6: Final answer
   x = 4,085.92