Finding the Fourth Proportional to 3,185.90, 4,776.52 and 2,143.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,185.90 : 4,776.52 = 2,143.31 : x
2. Step 2: Convert to fraction form
   3,185.90/4,776.52 = 2,143.31/x
3. Step 3: Cross multiply
   3,185.90x = 4,776.52 × 2,143.31
4. Step 4: Simplify right side
   3,185.90x = 10,237,563.08
5. Step 5: Solve for x
   x = 10,237,563.08/3,185.90
6. Step 6: Final answer
   x = 3,213.40