Finding the Fourth Proportional to 2,231.52, 3,079.46 and 1,236.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.52 : 3,079.46 = 1,236.80 : x
2. Step 2: Convert to fraction form
   2,231.52/3,079.46 = 1,236.80/x
3. Step 3: Cross multiply
   2,231.52x = 3,079.46 × 1,236.80
4. Step 4: Simplify right side
   2,231.52x = 3,808,654.55
5. Step 5: Solve for x
   x = 3,808,654.55/2,231.52
6. Step 6: Final answer
   x = 1,706.75