Finding the Fourth Proportional to 8,250, 12,359.61 and 4,085.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,250 : 12,359.61 = 4,085.25 : x
2. Step 2: Convert to fraction form
   8,250/12,359.61 = 4,085.25/x
3. Step 3: Cross multiply
   8,250x = 12,359.61 × 4,085.25
4. Step 4: Simplify right side
   8,250x = 50,492,096.75
5. Step 5: Solve for x
   x = 50,492,096.75/8,250
6. Step 6: Final answer
   x = 6,120.25