Finding the Fourth Proportional to 2,744.69, 4,111.56 and 1,279.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,744.69 : 4,111.56 = 1,279.40 : x
2. Step 2: Convert to fraction form
   2,744.69/4,111.56 = 1,279.40/x
3. Step 3: Cross multiply
   2,744.69x = 4,111.56 × 1,279.40
4. Step 4: Simplify right side
   2,744.69x = 5,260,309.31
5. Step 5: Solve for x
   x = 5,260,309.31/2,744.69
6. Step 6: Final answer
   x = 1,916.54