Finding the Fourth Proportional to 12,080.34, 18,121.05 and 3,315.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,080.34 : 18,121.05 = 3,315.33 : x
2. Step 2: Convert to fraction form
   12,080.34/18,121.05 = 3,315.33/x
3. Step 3: Cross multiply
   12,080.34x = 18,121.05 × 3,315.33
4. Step 4: Simplify right side
   12,080.34x = 60,077,260.70
5. Step 5: Solve for x
   x = 60,077,260.70/12,080.34
6. Step 6: Final answer
   x = 4,973.14