Finding the Fourth Proportional to 2,635.94, 3,951.79 and 1,319.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.94 : 3,951.79 = 1,319.59 : x
2. Step 2: Convert to fraction form
   2,635.94/3,951.79 = 1,319.59/x
3. Step 3: Cross multiply
   2,635.94x = 3,951.79 × 1,319.59
4. Step 4: Simplify right side
   2,635.94x = 5,214,744.21
5. Step 5: Solve for x
   x = 5,214,744.21/2,635.94
6. Step 6: Final answer
   x = 1,978.32