Finding the Fourth Proportional to 3,849.92, 5,311.20 and 2,590.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,849.92 : 5,311.20 = 2,590.72 : x
2. Step 2: Convert to fraction form
   3,849.92/5,311.20 = 2,590.72/x
3. Step 3: Cross multiply
   3,849.92x = 5,311.20 × 2,590.72
4. Step 4: Simplify right side
   3,849.92x = 13,759,832.06
5. Step 5: Solve for x
   x = 13,759,832.06/3,849.92
6. Step 6: Final answer
   x = 3,574.06