Finding the Fourth Proportional to 2,578.73, 3,842.72 and 2,422.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.73 : 3,842.72 = 2,422.89 : x
2. Step 2: Convert to fraction form
   2,578.73/3,842.72 = 2,422.89/x
3. Step 3: Cross multiply
   2,578.73x = 3,842.72 × 2,422.89
4. Step 4: Simplify right side
   2,578.73x = 9,310,475.75
5. Step 5: Solve for x
   x = 9,310,475.75/2,578.73
6. Step 6: Final answer
   x = 3,610.50