Finding the Fourth Proportional to 12,222.45, 18,321.12 and 4,823.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,222.45 : 18,321.12 = 4,823.91 : x
2. Step 2: Convert to fraction form
   12,222.45/18,321.12 = 4,823.91/x
3. Step 3: Cross multiply
   12,222.45x = 18,321.12 × 4,823.91
4. Step 4: Simplify right side
   12,222.45x = 88,379,433.98
5. Step 5: Solve for x
   x = 88,379,433.98/12,222.45
6. Step 6: Final answer
   x = 7,230.91