Finding the Fourth Proportional to 2,286.56, 3,155.46 and 1,238.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,286.56 : 3,155.46 = 1,238.63 : x
2. Step 2: Convert to fraction form
   2,286.56/3,155.46 = 1,238.63/x
3. Step 3: Cross multiply
   2,286.56x = 3,155.46 × 1,238.63
4. Step 4: Simplify right side
   2,286.56x = 3,908,427.00
5. Step 5: Solve for x
   x = 3,908,427.00/2,286.56
6. Step 6: Final answer
   x = 1,709.30