Finding the Fourth Proportional to 3,786.21, 5,683.37 and 2,145.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,786.21 : 5,683.37 = 2,145.96 : x
2. Step 2: Convert to fraction form
   3,786.21/5,683.37 = 2,145.96/x
3. Step 3: Cross multiply
   3,786.21x = 5,683.37 × 2,145.96
4. Step 4: Simplify right side
   3,786.21x = 12,196,273.96
5. Step 5: Solve for x
   x = 12,196,273.96/3,786.21
6. Step 6: Final answer
   x = 3,221.24