Finding the Fourth Proportional to 5,281.58, 7,919.45 and 3,617.61

Step by Step Solution

1. Step 1: Write the proportion equation
   5,281.58 : 7,919.45 = 3,617.61 : x
2. Step 2: Convert to fraction form
   5,281.58/7,919.45 = 3,617.61/x
3. Step 3: Cross multiply
   5,281.58x = 7,919.45 × 3,617.61
4. Step 4: Simplify right side
   5,281.58x = 28,649,460.86
5. Step 5: Solve for x
   x = 28,649,460.86/5,281.58
6. Step 6: Final answer
   x = 5,424.42