Finding the Fourth Proportional to 2,852.52, 4,279.23 and 1,391.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,852.52 : 4,279.23 = 1,391.78 : x
2. Step 2: Convert to fraction form
   2,852.52/4,279.23 = 1,391.78/x
3. Step 3: Cross multiply
   2,852.52x = 4,279.23 × 1,391.78
4. Step 4: Simplify right side
   2,852.52x = 5,955,757.43
5. Step 5: Solve for x
   x = 5,955,757.43/2,852.52
6. Step 6: Final answer
   x = 2,087.90