Finding the Fourth Proportional to 12,052.80, 18,057.94 and 10,555.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,052.80 : 18,057.94 = 10,555.31 : x
2. Step 2: Convert to fraction form
   12,052.80/18,057.94 = 10,555.31/x
3. Step 3: Cross multiply
   12,052.80x = 18,057.94 × 10,555.31
4. Step 4: Simplify right side
   12,052.80x = 190,607,173.42
5. Step 5: Solve for x
   x = 190,607,173.42/12,052.80
6. Step 6: Final answer
   x = 15,814.35