Finding the Fourth Proportional to 3,781.90, 5,219.18 and 2,103.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,781.90 : 5,219.18 = 2,103.30 : x
2. Step 2: Convert to fraction form
   3,781.90/5,219.18 = 2,103.30/x
3. Step 3: Cross multiply
   3,781.90x = 5,219.18 × 2,103.30
4. Step 4: Simplify right side
   3,781.90x = 10,977,501.29
5. Step 5: Solve for x
   x = 10,977,501.29/3,781.90
6. Step 6: Final answer
   x = 2,902.64