Finding the Fourth Proportional to 3,781.12, 5,218.78 and 2,103.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,781.12 : 5,218.78 = 2,103.10 : x
2. Step 2: Convert to fraction form
   3,781.12/5,218.78 = 2,103.10/x
3. Step 3: Cross multiply
   3,781.12x = 5,218.78 × 2,103.10
4. Step 4: Simplify right side
   3,781.12x = 10,975,616.22
5. Step 5: Solve for x
   x = 10,975,616.22/3,781.12
6. Step 6: Final answer
   x = 2,902.74