Finding the Fourth Proportional to 2,785.55, 4,178.61 and 911.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,785.55 : 4,178.61 = 911.52 : x
2. Step 2: Convert to fraction form
   2,785.55/4,178.61 = 911.52/x
3. Step 3: Cross multiply
   2,785.55x = 4,178.61 × 911.52
4. Step 4: Simplify right side
   2,785.55x = 3,808,886.59
5. Step 5: Solve for x
   x = 3,808,886.59/2,785.55
6. Step 6: Final answer
   x = 1,367.38