Finding the Fourth Proportional to 2,067.78, 3,098.52 and 1,245.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,067.78 : 3,098.52 = 1,245.12 : x
2. Step 2: Convert to fraction form
   2,067.78/3,098.52 = 1,245.12/x
3. Step 3: Cross multiply
   2,067.78x = 3,098.52 × 1,245.12
4. Step 4: Simplify right side
   2,067.78x = 3,858,029.22
5. Step 5: Solve for x
   x = 3,858,029.22/2,067.78
6. Step 6: Final answer
   x = 1,865.78