Finding the Fourth Proportional to 2,286.77, 3,155.74 and 1,238.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,286.77 : 3,155.74 = 1,238.83 : x
2. Step 2: Convert to fraction form
   2,286.77/3,155.74 = 1,238.83/x
3. Step 3: Cross multiply
   2,286.77x = 3,155.74 × 1,238.83
4. Step 4: Simplify right side
   2,286.77x = 3,909,425.38
5. Step 5: Solve for x
   x = 3,909,425.38/2,286.77
6. Step 6: Final answer
   x = 1,709.58