Finding the Fourth Proportional to 2,738.78, 4,104.92 and 1,274.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,738.78 : 4,104.92 = 1,274.90 : x
2. Step 2: Convert to fraction form
   2,738.78/4,104.92 = 1,274.90/x
3. Step 3: Cross multiply
   2,738.78x = 4,104.92 × 1,274.90
4. Step 4: Simplify right side
   2,738.78x = 5,233,362.51
5. Step 5: Solve for x
   x = 5,233,362.51/2,738.78
6. Step 6: Final answer
   x = 1,910.84