Finding the Fourth Proportional to 2,754.16, 4,128.34 and 904.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,754.16 : 4,128.34 = 904.78 : x
2. Step 2: Convert to fraction form
   2,754.16/4,128.34 = 904.78/x
3. Step 3: Cross multiply
   2,754.16x = 4,128.34 × 904.78
4. Step 4: Simplify right side
   2,754.16x = 3,735,239.47
5. Step 5: Solve for x
   x = 3,735,239.47/2,754.16
6. Step 6: Final answer
   x = 1,356.22