Finding the Fourth Proportional to 12,052.72, 18,076.65 and 3,286.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,052.72 : 18,076.65 = 3,286.90 : x
2. Step 2: Convert to fraction form
   12,052.72/18,076.65 = 3,286.90/x
3. Step 3: Cross multiply
   12,052.72x = 18,076.65 × 3,286.90
4. Step 4: Simplify right side
   12,052.72x = 59,416,140.89
5. Step 5: Solve for x
   x = 59,416,140.89/12,052.72
6. Step 6: Final answer
   x = 4,929.69