Finding the Fourth Proportional to 3,111.63, 4,291.17 and 2,271.01

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.63 : 4,291.17 = 2,271.01 : x
2. Step 2: Convert to fraction form
   3,111.63/4,291.17 = 2,271.01/x
3. Step 3: Cross multiply
   3,111.63x = 4,291.17 × 2,271.01
4. Step 4: Simplify right side
   3,111.63x = 9,745,271.21
5. Step 5: Solve for x
   x = 9,745,271.21/3,111.63
6. Step 6: Final answer
   x = 3,131.88