Finding the Fourth Proportional to 12,216.69, 18,321.59 and 4,718.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,216.69 : 18,321.59 = 4,718.52 : x
2. Step 2: Convert to fraction form
   12,216.69/18,321.59 = 4,718.52/x
3. Step 3: Cross multiply
   12,216.69x = 18,321.59 × 4,718.52
4. Step 4: Simplify right side
   12,216.69x = 86,450,800.64
5. Step 5: Solve for x
   x = 86,450,800.64/12,216.69
6. Step 6: Final answer
   x = 7,076.45