Finding the Fourth Proportional to 2,811.23, 3,878.17 and 1,816.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,811.23 : 3,878.17 = 1,816.82 : x
2. Step 2: Convert to fraction form
   2,811.23/3,878.17 = 1,816.82/x
3. Step 3: Cross multiply
   2,811.23x = 3,878.17 × 1,816.82
4. Step 4: Simplify right side
   2,811.23x = 7,045,936.82
5. Step 5: Solve for x
   x = 7,045,936.82/2,811.23
6. Step 6: Final answer
   x = 2,506.35