Finding the Fourth Proportional to 3,815.51, 5,719.37 and 2,147.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,815.51 : 5,719.37 = 2,147.18 : x
2. Step 2: Convert to fraction form
   3,815.51/5,719.37 = 2,147.18/x
3. Step 3: Cross multiply
   3,815.51x = 5,719.37 × 2,147.18
4. Step 4: Simplify right side
   3,815.51x = 12,280,477.54
5. Step 5: Solve for x
   x = 12,280,477.54/3,815.51
6. Step 6: Final answer
   x = 3,218.57