Finding the Fourth Proportional to 3,863.27, 5,790.42 and 1,778.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,863.27 : 5,790.42 = 1,778.90 : x
2. Step 2: Convert to fraction form
   3,863.27/5,790.42 = 1,778.90/x
3. Step 3: Cross multiply
   3,863.27x = 5,790.42 × 1,778.90
4. Step 4: Simplify right side
   3,863.27x = 10,300,549.19
5. Step 5: Solve for x
   x = 10,300,549.19/3,863.27
6. Step 6: Final answer
   x = 2,666.28