Finding the Fourth Proportional to 5,078.80, 7,616.82 and 1,790.12

Step by Step Solution

1. Step 1: Write the proportion equation
   5,078.80 : 7,616.82 = 1,790.12 : x
2. Step 2: Convert to fraction form
   5,078.80/7,616.82 = 1,790.12/x
3. Step 3: Cross multiply
   5,078.80x = 7,616.82 × 1,790.12
4. Step 4: Simplify right side
   5,078.80x = 13,635,021.82
5. Step 5: Solve for x
   x = 13,635,021.82/5,078.80
6. Step 6: Final answer
   x = 2,684.69