Finding the Fourth Proportional to 2,231.43, 3,080.58 and 1,392.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.43 : 3,080.58 = 1,392.89 : x
2. Step 2: Convert to fraction form
   2,231.43/3,080.58 = 1,392.89/x
3. Step 3: Cross multiply
   2,231.43x = 3,080.58 × 1,392.89
4. Step 4: Simplify right side
   2,231.43x = 4,290,893.67
5. Step 5: Solve for x
   x = 4,290,893.67/2,231.43
6. Step 6: Final answer
   x = 1,922.93