Finding the Fourth Proportional to 12,404.85, 18,609.83 and 4,085.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,404.85 : 18,609.83 = 4,085.36 : x
2. Step 2: Convert to fraction form
   12,404.85/18,609.83 = 4,085.36/x
3. Step 3: Cross multiply
   12,404.85x = 18,609.83 × 4,085.36
4. Step 4: Simplify right side
   12,404.85x = 76,027,741.61
5. Step 5: Solve for x
   x = 76,027,741.61/12,404.85
6. Step 6: Final answer
   x = 6,128.87