Finding the Fourth Proportional to 2,286.75, 3,155.72 and 1,238.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,286.75 : 3,155.72 = 1,238.82 : x
2. Step 2: Convert to fraction form
   2,286.75/3,155.72 = 1,238.82/x
3. Step 3: Cross multiply
   2,286.75x = 3,155.72 × 1,238.82
4. Step 4: Simplify right side
   2,286.75x = 3,909,362.86
5. Step 5: Solve for x
   x = 3,909,362.86/2,286.75
6. Step 6: Final answer
   x = 1,709.57