Finding the Fourth Proportional to 8,819.42, 12,171.18 and 5,281.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,819.42 : 12,171.18 = 5,281.96 : x
2. Step 2: Convert to fraction form
   8,819.42/12,171.18 = 5,281.96/x
3. Step 3: Cross multiply
   8,819.42x = 12,171.18 × 5,281.96
4. Step 4: Simplify right side
   8,819.42x = 64,287,685.91
5. Step 5: Solve for x
   x = 64,287,685.91/8,819.42
6. Step 6: Final answer
   x = 7,289.33