Finding the Fourth Proportional to 2,286.63, 3,155.53 and 1,238.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,286.63 : 3,155.53 = 1,238.69 : x
2. Step 2: Convert to fraction form
   2,286.63/3,155.53 = 1,238.69/x
3. Step 3: Cross multiply
   2,286.63x = 3,155.53 × 1,238.69
4. Step 4: Simplify right side
   2,286.63x = 3,908,723.46
5. Step 5: Solve for x
   x = 3,908,723.46/2,286.63
6. Step 6: Final answer
   x = 1,709.38