Finding the Fourth Proportional to 2,754.78, 4,131.30 and 905.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,754.78 : 4,131.30 = 905.46 : x
2. Step 2: Convert to fraction form
   2,754.78/4,131.30 = 905.46/x
3. Step 3: Cross multiply
   2,754.78x = 4,131.30 × 905.46
4. Step 4: Simplify right side
   2,754.78x = 3,740,730.40
5. Step 5: Solve for x
   x = 3,740,730.40/2,754.78
6. Step 6: Final answer
   x = 1,357.90