Finding the Fourth Proportional to 2,540.87, 3,806.38 and 1,872.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.87 : 3,806.38 = 1,872.56 : x
2. Step 2: Convert to fraction form
   2,540.87/3,806.38 = 1,872.56/x
3. Step 3: Cross multiply
   2,540.87x = 3,806.38 × 1,872.56
4. Step 4: Simplify right side
   2,540.87x = 7,127,665.38
5. Step 5: Solve for x
   x = 7,127,665.38/2,540.87
6. Step 6: Final answer
   x = 2,805.20