Finding the Fourth Proportional to 3,781.91, 5,218.94 and 2,103.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,781.91 : 5,218.94 = 2,103.31 : x
2. Step 2: Convert to fraction form
   3,781.91/5,218.94 = 2,103.31/x
3. Step 3: Cross multiply
   3,781.91x = 5,218.94 × 2,103.31
4. Step 4: Simplify right side
   3,781.91x = 10,977,039.88
5. Step 5: Solve for x
   x = 10,977,039.88/3,781.91
6. Step 6: Final answer
   x = 2,902.51