Finding the Fourth Proportional to 1,072.83, 1,608.66 and 579.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.83 : 1,608.66 = 579.82 : x
2. Step 2: Convert to fraction form
   1,072.83/1,608.66 = 579.82/x
3. Step 3: Cross multiply
   1,072.83x = 1,608.66 × 579.82
4. Step 4: Simplify right side
   1,072.83x = 932,734.50
5. Step 5: Solve for x
   x = 932,734.50/1,072.83
6. Step 6: Final answer
   x = 869.42