Finding the Fourth Proportional to 1,578.91, 2,179.56 and 1,162.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,578.91 : 2,179.56 = 1,162.57 : x
2. Step 2: Convert to fraction form
   1,578.91/2,179.56 = 1,162.57/x
3. Step 3: Cross multiply
   1,578.91x = 2,179.56 × 1,162.57
4. Step 4: Simplify right side
   1,578.91x = 2,533,891.07
5. Step 5: Solve for x
   x = 2,533,891.07/1,578.91
6. Step 6: Final answer
   x = 1,604.84