Finding the Fourth Proportional to 3,111.06, 4,291.63 and 1,851.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.06 : 4,291.63 = 1,851.22 : x
2. Step 2: Convert to fraction form
   3,111.06/4,291.63 = 1,851.22/x
3. Step 3: Cross multiply
   3,111.06x = 4,291.63 × 1,851.22
4. Step 4: Simplify right side
   3,111.06x = 7,944,742.03
5. Step 5: Solve for x
   x = 7,944,742.03/3,111.06
6. Step 6: Final answer
   x = 2,553.71