Finding the Fourth Proportional to 4,287.98, 5,920.72 and 3,291.68

Step by Step Solution

1. Step 1: Write the proportion equation
   4,287.98 : 5,920.72 = 3,291.68 : x
2. Step 2: Convert to fraction form
   4,287.98/5,920.72 = 3,291.68/x
3. Step 3: Cross multiply
   4,287.98x = 5,920.72 × 3,291.68
4. Step 4: Simplify right side
   4,287.98x = 19,489,115.61
5. Step 5: Solve for x
   x = 19,489,115.61/4,287.98
6. Step 6: Final answer
   x = 4,545.06