Finding the Fourth Proportional to 12,057.36, 18,062.49 and 8,308.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,057.36 : 18,062.49 = 8,308.47 : x
2. Step 2: Convert to fraction form
   12,057.36/18,062.49 = 8,308.47/x
3. Step 3: Cross multiply
   12,057.36x = 18,062.49 × 8,308.47
4. Step 4: Simplify right side
   12,057.36x = 150,071,656.29
5. Step 5: Solve for x
   x = 150,071,656.29/12,057.36
6. Step 6: Final answer
   x = 12,446.48