Finding the Fourth Proportional to 12,057.48, 18,113.82 and 8,556.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,057.48 : 18,113.82 = 8,556.12 : x
2. Step 2: Convert to fraction form
   12,057.48/18,113.82 = 8,556.12/x
3. Step 3: Cross multiply
   12,057.48x = 18,113.82 × 8,556.12
4. Step 4: Simplify right side
   12,057.48x = 154,984,017.58
5. Step 5: Solve for x
   x = 154,984,017.58/12,057.48
6. Step 6: Final answer
   x = 12,853.77