Finding the Fourth Proportional to 5,179.61, 7,145.72 and 3,608.61

Step by Step Solution

1. Step 1: Write the proportion equation
   5,179.61 : 7,145.72 = 3,608.61 : x
2. Step 2: Convert to fraction form
   5,179.61/7,145.72 = 3,608.61/x
3. Step 3: Cross multiply
   5,179.61x = 7,145.72 × 3,608.61
4. Step 4: Simplify right side
   5,179.61x = 25,786,098.61
5. Step 5: Solve for x
   x = 25,786,098.61/5,179.61
6. Step 6: Final answer
   x = 4,978.39