Finding the Fourth Proportional to 12,056.80, 18,084.12 and 3,290.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,056.80 : 18,084.12 = 3,290.80 : x
2. Step 2: Convert to fraction form
   12,056.80/18,084.12 = 3,290.80/x
3. Step 3: Cross multiply
   12,056.80x = 18,084.12 × 3,290.80
4. Step 4: Simplify right side
   12,056.80x = 59,511,222.10
5. Step 5: Solve for x
   x = 59,511,222.10/12,056.80
6. Step 6: Final answer
   x = 4,935.91