Finding the Fourth Proportional to 2,597.40, 3,891.49 and 1,979.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,597.40 : 3,891.49 = 1,979.24 : x
2. Step 2: Convert to fraction form
   2,597.40/3,891.49 = 1,979.24/x
3. Step 3: Cross multiply
   2,597.40x = 3,891.49 × 1,979.24
4. Step 4: Simplify right side
   2,597.40x = 7,702,179.40
5. Step 5: Solve for x
   x = 7,702,179.40/2,597.40
6. Step 6: Final answer
   x = 2,965.34