Finding the Fourth Proportional to 12,085.86, 18,125.49 and 3,318.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,085.86 : 18,125.49 = 3,318.69 : x
2. Step 2: Convert to fraction form
   12,085.86/18,125.49 = 3,318.69/x
3. Step 3: Cross multiply
   12,085.86x = 18,125.49 × 3,318.69
4. Step 4: Simplify right side
   12,085.86x = 60,152,882.41
5. Step 5: Solve for x
   x = 60,152,882.41/12,085.86
6. Step 6: Final answer
   x = 4,977.13