Finding the Fourth Proportional to 3,718.80, 5,131.91 and 2,040.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,718.80 : 5,131.91 = 2,040.12 : x
2. Step 2: Convert to fraction form
   3,718.80/5,131.91 = 2,040.12/x
3. Step 3: Cross multiply
   3,718.80x = 5,131.91 × 2,040.12
4. Step 4: Simplify right side
   3,718.80x = 10,469,702.03
5. Step 5: Solve for x
   x = 10,469,702.03/3,718.80
6. Step 6: Final answer
   x = 2,815.34