Finding the Fourth Proportional to 2,791.40, 4,185.89 and 1,403.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,791.40 : 4,185.89 = 1,403.87 : x
2. Step 2: Convert to fraction form
   2,791.40/4,185.89 = 1,403.87/x
3. Step 3: Cross multiply
   2,791.40x = 4,185.89 × 1,403.87
4. Step 4: Simplify right side
   2,791.40x = 5,876,438.37
5. Step 5: Solve for x
   x = 5,876,438.37/2,791.40
6. Step 6: Final answer
   x = 2,105.19