Finding the Fourth Proportional to 12,404.56, 18,609.40 and 4,085.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,404.56 : 18,609.40 = 4,085.08 : x
2. Step 2: Convert to fraction form
   12,404.56/18,609.40 = 4,085.08/x
3. Step 3: Cross multiply
   12,404.56x = 18,609.40 × 4,085.08
4. Step 4: Simplify right side
   12,404.56x = 76,020,887.75
5. Step 5: Solve for x
   x = 76,020,887.75/12,404.56
6. Step 6: Final answer
   x = 6,128.46