Finding the Fourth Proportional to 2,885.46, 3,979.89 and 2,842.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,885.46 : 3,979.89 = 2,842.26 : x
2. Step 2: Convert to fraction form
   2,885.46/3,979.89 = 2,842.26/x
3. Step 3: Cross multiply
   2,885.46x = 3,979.89 × 2,842.26
4. Step 4: Simplify right side
   2,885.46x = 11,311,882.15
5. Step 5: Solve for x
   x = 11,311,882.15/2,885.46
6. Step 6: Final answer
   x = 3,920.30