Finding the Fourth Proportional to 3,111.48, 4,662.18 and 2,071.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.48 : 4,662.18 = 2,071.80 : x
2. Step 2: Convert to fraction form
   3,111.48/4,662.18 = 2,071.80/x
3. Step 3: Cross multiply
   3,111.48x = 4,662.18 × 2,071.80
4. Step 4: Simplify right side
   3,111.48x = 9,659,104.52
5. Step 5: Solve for x
   x = 9,659,104.52/3,111.48
6. Step 6: Final answer
   x = 3,104.34