Finding the Fourth Proportional to 2,754.15, 4,128.34 and 904.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,754.15 : 4,128.34 = 904.79 : x
2. Step 2: Convert to fraction form
   2,754.15/4,128.34 = 904.79/x
3. Step 3: Cross multiply
   2,754.15x = 4,128.34 × 904.79
4. Step 4: Simplify right side
   2,754.15x = 3,735,280.75
5. Step 5: Solve for x
   x = 3,735,280.75/2,754.15
6. Step 6: Final answer
   x = 1,356.24