Finding the Fourth Proportional to 12,057.42, 18,084.09 and 3,290.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,057.42 : 18,084.09 = 3,290.31 : x
2. Step 2: Convert to fraction form
   12,057.42/18,084.09 = 3,290.31/x
3. Step 3: Cross multiply
   12,057.42x = 18,084.09 × 3,290.31
4. Step 4: Simplify right side
   12,057.42x = 59,502,262.17
5. Step 5: Solve for x
   x = 59,502,262.17/12,057.42
6. Step 6: Final answer
   x = 4,934.91