Finding the Fourth Proportional to 2,231.83, 3,080.43 and 1,392.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.83 : 3,080.43 = 1,392.37 : x
2. Step 2: Convert to fraction form
   2,231.83/3,080.43 = 1,392.37/x
3. Step 3: Cross multiply
   2,231.83x = 3,080.43 × 1,392.37
4. Step 4: Simplify right side
   2,231.83x = 4,289,098.32
5. Step 5: Solve for x
   x = 4,289,098.32/2,231.83
6. Step 6: Final answer
   x = 1,921.79