Finding the Fourth Proportional to 2,855.35, 4,283.71 and 907.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,855.35 : 4,283.71 = 907.56 : x
2. Step 2: Convert to fraction form
   2,855.35/4,283.71 = 907.56/x
3. Step 3: Cross multiply
   2,855.35x = 4,283.71 × 907.56
4. Step 4: Simplify right side
   2,855.35x = 3,887,723.85
5. Step 5: Solve for x
   x = 3,887,723.85/2,855.35
6. Step 6: Final answer
   x = 1,361.56