Finding the Fourth Proportional to 12,385.85, 18,579.98 and 4,065.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,385.85 : 18,579.98 = 4,065.89 : x
2. Step 2: Convert to fraction form
   12,385.85/18,579.98 = 4,065.89/x
3. Step 3: Cross multiply
   12,385.85x = 18,579.98 × 4,065.89
4. Step 4: Simplify right side
   12,385.85x = 75,544,072.15
5. Step 5: Solve for x
   x = 75,544,072.15/12,385.85
6. Step 6: Final answer
   x = 6,099.23