Finding the Fourth Proportional to 1,815.63, 2,721.69 and 582.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.63 : 2,721.69 = 582.15 : x
2. Step 2: Convert to fraction form
   1,815.63/2,721.69 = 582.15/x
3. Step 3: Cross multiply
   1,815.63x = 2,721.69 × 582.15
4. Step 4: Simplify right side
   1,815.63x = 1,584,431.83
5. Step 5: Solve for x
   x = 1,584,431.83/1,815.63
6. Step 6: Final answer
   x = 872.66