Finding the Fourth Proportional to 8,218.68, 12,312.42 and 4,879.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,218.68 : 12,312.42 = 4,879.86 : x
2. Step 2: Convert to fraction form
   8,218.68/12,312.42 = 4,879.86/x
3. Step 3: Cross multiply
   8,218.68x = 12,312.42 × 4,879.86
4. Step 4: Simplify right side
   8,218.68x = 60,082,885.86
5. Step 5: Solve for x
   x = 60,082,885.86/8,218.68
6. Step 6: Final answer
   x = 7,310.53