Finding the Fourth Proportional to 2,540.73, 3,812.31 and 1,431.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.73 : 3,812.31 = 1,431.03 : x
2. Step 2: Convert to fraction form
   2,540.73/3,812.31 = 1,431.03/x
3. Step 3: Cross multiply
   2,540.73x = 3,812.31 × 1,431.03
4. Step 4: Simplify right side
   2,540.73x = 5,455,529.98
5. Step 5: Solve for x
   x = 5,455,529.98/2,540.73
6. Step 6: Final answer
   x = 2,147.23