Finding the Fourth Proportional to 2,785.32, 4,178.61 and 936.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,785.32 : 4,178.61 = 936.45 : x
2. Step 2: Convert to fraction form
   2,785.32/4,178.61 = 936.45/x
3. Step 3: Cross multiply
   2,785.32x = 4,178.61 × 936.45
4. Step 4: Simplify right side
   2,785.32x = 3,913,059.33
5. Step 5: Solve for x
   x = 3,913,059.33/2,785.32
6. Step 6: Final answer
   x = 1,404.89