Finding the Fourth Proportional to 2,231.49, 3,079.46 and 1,236.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.49 : 3,079.46 = 1,236.81 : x
2. Step 2: Convert to fraction form
   2,231.49/3,079.46 = 1,236.81/x
3. Step 3: Cross multiply
   2,231.49x = 3,079.46 × 1,236.81
4. Step 4: Simplify right side
   2,231.49x = 3,808,685.34
5. Step 5: Solve for x
   x = 3,808,685.34/2,231.49
6. Step 6: Final answer
   x = 1,706.79