Finding the Fourth Proportional to 12,085.22, 18,128.46 and 3,319.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,085.22 : 18,128.46 = 3,319.94 : x
2. Step 2: Convert to fraction form
   12,085.22/18,128.46 = 3,319.94/x
3. Step 3: Cross multiply
   12,085.22x = 18,128.46 × 3,319.94
4. Step 4: Simplify right side
   12,085.22x = 60,185,399.49
5. Step 5: Solve for x
   x = 60,185,399.49/12,085.22
6. Step 6: Final answer
   x = 4,980.08