Finding the Fourth Proportional to 2,557.46, 3,836.55 and 914.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.46 : 3,836.55 = 914.28 : x
2. Step 2: Convert to fraction form
   2,557.46/3,836.55 = 914.28/x
3. Step 3: Cross multiply
   2,557.46x = 3,836.55 × 914.28
4. Step 4: Simplify right side
   2,557.46x = 3,507,680.93
5. Step 5: Solve for x
   x = 3,507,680.93/2,557.46
6. Step 6: Final answer
   x = 1,371.55