Finding the Fourth Proportional to 2,785.41, 4,178.46 and 936.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,785.41 : 4,178.46 = 936.72 : x
2. Step 2: Convert to fraction form
   2,785.41/4,178.46 = 936.72/x
3. Step 3: Cross multiply
   2,785.41x = 4,178.46 × 936.72
4. Step 4: Simplify right side
   2,785.41x = 3,914,047.05
5. Step 5: Solve for x
   x = 3,914,047.05/2,785.41
6. Step 6: Final answer
   x = 1,405.20