Finding the Fourth Proportional to 12,057.15, 18,062.87 and 7,112.07

Step by Step Solution

1. Step 1: Write the proportion equation
   12,057.15 : 18,062.87 = 7,112.07 : x
2. Step 2: Convert to fraction form
   12,057.15/18,062.87 = 7,112.07/x
3. Step 3: Cross multiply
   12,057.15x = 18,062.87 × 7,112.07
4. Step 4: Simplify right side
   12,057.15x = 128,464,360.28
5. Step 5: Solve for x
   x = 128,464,360.28/12,057.15
6. Step 6: Final answer
   x = 10,654.62