Finding the Fourth Proportional to 2,555.49, 3,833.60 and 911.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.49 : 3,833.60 = 911.69 : x
2. Step 2: Convert to fraction form
   2,555.49/3,833.60 = 911.69/x
3. Step 3: Cross multiply
   2,555.49x = 3,833.60 × 911.69
4. Step 4: Simplify right side
   2,555.49x = 3,495,054.78
5. Step 5: Solve for x
   x = 3,495,054.78/2,555.49
6. Step 6: Final answer
   x = 1,367.67