Finding the Fourth Proportional to 1,828.82, 2,739.29 and 961.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,828.82 : 2,739.29 = 961.31 : x
2. Step 2: Convert to fraction form
   1,828.82/2,739.29 = 961.31/x
3. Step 3: Cross multiply
   1,828.82x = 2,739.29 × 961.31
4. Step 4: Simplify right side
   1,828.82x = 2,633,308.91
5. Step 5: Solve for x
   x = 2,633,308.91/1,828.82
6. Step 6: Final answer
   x = 1,439.89