Finding the Fourth Proportional to 8,158.35, 12,221.33 and 4,861.65

Step by Step Solution

1. Step 1: Write the proportion equation
   8,158.35 : 12,221.33 = 4,861.65 : x
2. Step 2: Convert to fraction form
   8,158.35/12,221.33 = 4,861.65/x
3. Step 3: Cross multiply
   8,158.35x = 12,221.33 × 4,861.65
4. Step 4: Simplify right side
   8,158.35x = 59,415,804.69
5. Step 5: Solve for x
   x = 59,415,804.69/8,158.35
6. Step 6: Final answer
   x = 7,282.82