Finding the Fourth Proportional to 2,649.78, 3,982.23 and 1,790.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,649.78 : 3,982.23 = 1,790.10 : x
2. Step 2: Convert to fraction form
   2,649.78/3,982.23 = 1,790.10/x
3. Step 3: Cross multiply
   2,649.78x = 3,982.23 × 1,790.10
4. Step 4: Simplify right side
   2,649.78x = 7,128,589.92
5. Step 5: Solve for x
   x = 7,128,589.92/2,649.78
6. Step 6: Final answer
   x = 2,690.26