Finding the Fourth Proportional to 12,209.59, 18,317.02 and 4,311.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,209.59 : 18,317.02 = 4,311.82 : x
2. Step 2: Convert to fraction form
   12,209.59/18,317.02 = 4,311.82/x
3. Step 3: Cross multiply
   12,209.59x = 18,317.02 × 4,311.82
4. Step 4: Simplify right side
   12,209.59x = 78,979,693.18
5. Step 5: Solve for x
   x = 78,979,693.18/12,209.59
6. Step 6: Final answer
   x = 6,468.66