Finding the Fourth Proportional to 12,087.64, 18,128.46 and 3,322.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.64 : 18,128.46 = 3,322.12 : x
2. Step 2: Convert to fraction form
   12,087.64/18,128.46 = 3,322.12/x
3. Step 3: Cross multiply
   12,087.64x = 18,128.46 × 3,322.12
4. Step 4: Simplify right side
   12,087.64x = 60,224,919.54
5. Step 5: Solve for x
   x = 60,224,919.54/12,087.64
6. Step 6: Final answer
   x = 4,982.36