Finding the Fourth Proportional to 2,649.78, 3,658.41 and 1,810.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,649.78 : 3,658.41 = 1,810.18 : x
2. Step 2: Convert to fraction form
   2,649.78/3,658.41 = 1,810.18/x
3. Step 3: Cross multiply
   2,649.78x = 3,658.41 × 1,810.18
4. Step 4: Simplify right side
   2,649.78x = 6,622,380.61
5. Step 5: Solve for x
   x = 6,622,380.61/2,649.78
6. Step 6: Final answer
   x = 2,499.22