Finding the Fourth Proportional to 2,713.28, 4,076.78 and 2,603.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,713.28 : 4,076.78 = 2,603.94 : x
2. Step 2: Convert to fraction form
   2,713.28/4,076.78 = 2,603.94/x
3. Step 3: Cross multiply
   2,713.28x = 4,076.78 × 2,603.94
4. Step 4: Simplify right side
   2,713.28x = 10,615,690.51
5. Step 5: Solve for x
   x = 10,615,690.51/2,713.28
6. Step 6: Final answer
   x = 3,912.49