Finding the Fourth Proportional to 2,231.88, 3,080.34 and 1,274.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.88 : 3,080.34 = 1,274.79 : x
2. Step 2: Convert to fraction form
   2,231.88/3,080.34 = 1,274.79/x
3. Step 3: Cross multiply
   2,231.88x = 3,080.34 × 1,274.79
4. Step 4: Simplify right side
   2,231.88x = 3,926,786.63
5. Step 5: Solve for x
   x = 3,926,786.63/2,231.88
6. Step 6: Final answer
   x = 1,759.41