Finding the Fourth Proportional to 12,146.89, 18,220.57 and 3,827.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,146.89 : 18,220.57 = 3,827.18 : x
2. Step 2: Convert to fraction form
   12,146.89/18,220.57 = 3,827.18/x
3. Step 3: Cross multiply
   12,146.89x = 18,220.57 × 3,827.18
4. Step 4: Simplify right side
   12,146.89x = 69,733,401.09
5. Step 5: Solve for x
   x = 69,733,401.09/12,146.89
6. Step 6: Final answer
   x = 5,740.84