Finding the Fourth Proportional to 3,513.78, 5,268.15 and 1,871.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,513.78 : 5,268.15 = 1,871.10 : x
2. Step 2: Convert to fraction form
   3,513.78/5,268.15 = 1,871.10/x
3. Step 3: Cross multiply
   3,513.78x = 5,268.15 × 1,871.10
4. Step 4: Simplify right side
   3,513.78x = 9,857,235.47
5. Step 5: Solve for x
   x = 9,857,235.47/3,513.78
6. Step 6: Final answer
   x = 2,805.31