Finding the Fourth Proportional to 3,863.23, 5,792.28 and 1,990.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,863.23 : 5,792.28 = 1,990.27 : x
2. Step 2: Convert to fraction form
   3,863.23/5,792.28 = 1,990.27/x
3. Step 3: Cross multiply
   3,863.23x = 5,792.28 × 1,990.27
4. Step 4: Simplify right side
   3,863.23x = 11,528,200.89
5. Step 5: Solve for x
   x = 11,528,200.89/3,863.23
6. Step 6: Final answer
   x = 2,984.09