Finding the Fourth Proportional to 1,081.94, 1,611.59 and 1,067.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.94 : 1,611.59 = 1,067.58 : x
2. Step 2: Convert to fraction form
   1,081.94/1,611.59 = 1,067.58/x
3. Step 3: Cross multiply
   1,081.94x = 1,611.59 × 1,067.58
4. Step 4: Simplify right side
   1,081.94x = 1,720,495.91
5. Step 5: Solve for x
   x = 1,720,495.91/1,081.94
6. Step 6: Final answer
   x = 1,590.20