Finding the Fourth Proportional to 2,078.79, 3,118.62 and 673.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.79 : 3,118.62 = 673.17 : x
2. Step 2: Convert to fraction form
   2,078.79/3,118.62 = 673.17/x
3. Step 3: Cross multiply
   2,078.79x = 3,118.62 × 673.17
4. Step 4: Simplify right side
   2,078.79x = 2,099,361.43
5. Step 5: Solve for x
   x = 2,099,361.43/2,078.79
6. Step 6: Final answer
   x = 1,009.90