Finding the Fourth Proportional to 2,236.56, 3,086.54 and 1,228.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,236.56 : 3,086.54 = 1,228.31 : x
2. Step 2: Convert to fraction form
   2,236.56/3,086.54 = 1,228.31/x
3. Step 3: Cross multiply
   2,236.56x = 3,086.54 × 1,228.31
4. Step 4: Simplify right side
   2,236.56x = 3,791,226.89
5. Step 5: Solve for x
   x = 3,791,226.89/2,236.56
6. Step 6: Final answer
   x = 1,695.11