Finding the Fourth Proportional to 1,827.16, 2,520.56 and 1,578.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,827.16 : 2,520.56 = 1,578.42 : x
2. Step 2: Convert to fraction form
   1,827.16/2,520.56 = 1,578.42/x
3. Step 3: Cross multiply
   1,827.16x = 2,520.56 × 1,578.42
4. Step 4: Simplify right side
   1,827.16x = 3,978,502.32
5. Step 5: Solve for x
   x = 3,978,502.32/1,827.16
6. Step 6: Final answer
   x = 2,177.42