Finding the Fourth Proportional to 2,231.59, 3,079.61 and 1,236.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.59 : 3,079.61 = 1,236.94 : x
2. Step 2: Convert to fraction form
   2,231.59/3,079.61 = 1,236.94/x
3. Step 3: Cross multiply
   2,231.59x = 3,079.61 × 1,236.94
4. Step 4: Simplify right side
   2,231.59x = 3,809,292.79
5. Step 5: Solve for x
   x = 3,809,292.79/2,231.59
6. Step 6: Final answer
   x = 1,706.99