Finding the Fourth Proportional to 12,404.48, 18,609.64 and 4,085.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,404.48 : 18,609.64 = 4,085.16 : x
2. Step 2: Convert to fraction form
   12,404.48/18,609.64 = 4,085.16/x
3. Step 3: Cross multiply
   12,404.48x = 18,609.64 × 4,085.16
4. Step 4: Simplify right side
   12,404.48x = 76,023,356.94
5. Step 5: Solve for x
   x = 76,023,356.94/12,404.48
6. Step 6: Final answer
   x = 6,128.70