Finding the Fourth Proportional to 2,978.91, 4,107.39 and 2,417.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.91 : 4,107.39 = 2,417.61 : x
2. Step 2: Convert to fraction form
   2,978.91/4,107.39 = 2,417.61/x
3. Step 3: Cross multiply
   2,978.91x = 4,107.39 × 2,417.61
4. Step 4: Simplify right side
   2,978.91x = 9,930,067.14
5. Step 5: Solve for x
   x = 9,930,067.14/2,978.91
6. Step 6: Final answer
   x = 3,333.46