Finding the Fourth Proportional to 3,865.68, 5,790.78 and 1,782.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,865.68 : 5,790.78 = 1,782.83 : x
2. Step 2: Convert to fraction form
   3,865.68/5,790.78 = 1,782.83/x
3. Step 3: Cross multiply
   3,865.68x = 5,790.78 × 1,782.83
4. Step 4: Simplify right side
   3,865.68x = 10,323,990.78
5. Step 5: Solve for x
   x = 10,323,990.78/3,865.68
6. Step 6: Final answer
   x = 2,670.68