Finding the Fourth Proportional to 2,821.57, 3,892.47 and 1,827.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,821.57 : 3,892.47 = 1,827.18 : x
2. Step 2: Convert to fraction form
   2,821.57/3,892.47 = 1,827.18/x
3. Step 3: Cross multiply
   2,821.57x = 3,892.47 × 1,827.18
4. Step 4: Simplify right side
   2,821.57x = 7,112,243.33
5. Step 5: Solve for x
   x = 7,112,243.33/2,821.57
6. Step 6: Final answer
   x = 2,520.67