Finding the Fourth Proportional to 2,078.93, 3,118.76 and 780.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.93 : 3,118.76 = 780.41 : x
2. Step 2: Convert to fraction form
   2,078.93/3,118.76 = 780.41/x
3. Step 3: Cross multiply
   2,078.93x = 3,118.76 × 780.41
4. Step 4: Simplify right side
   2,078.93x = 2,433,911.49
5. Step 5: Solve for x
   x = 2,433,911.49/2,078.93
6. Step 6: Final answer
   x = 1,170.75