Finding the Fourth Proportional to 3,581.99, 4,941.90 and 2,255.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,581.99 : 4,941.90 = 2,255.21 : x
2. Step 2: Convert to fraction form
   3,581.99/4,941.90 = 2,255.21/x
3. Step 3: Cross multiply
   3,581.99x = 4,941.90 × 2,255.21
4. Step 4: Simplify right side
   3,581.99x = 11,144,997.59
5. Step 5: Solve for x
   x = 11,144,997.59/3,581.99
6. Step 6: Final answer
   x = 3,111.40