Finding the Fourth Proportional to 2,811.42, 3,878.82 and 1,817.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,811.42 : 3,878.82 = 1,817.96 : x
2. Step 2: Convert to fraction form
   2,811.42/3,878.82 = 1,817.96/x
3. Step 3: Cross multiply
   2,811.42x = 3,878.82 × 1,817.96
4. Step 4: Simplify right side
   2,811.42x = 7,051,520.21
5. Step 5: Solve for x
   x = 7,051,520.21/2,811.42
6. Step 6: Final answer
   x = 2,508.17