Finding the Fourth Proportional to 18,663.34, 25,781.52 and 12,995.25

Step by Step Solution

1. Step 1: Write the proportion equation
   18,663.34 : 25,781.52 = 12,995.25 : x
2. Step 2: Convert to fraction form
   18,663.34/25,781.52 = 12,995.25/x
3. Step 3: Cross multiply
   18,663.34x = 25,781.52 × 12,995.25
4. Step 4: Simplify right side
   18,663.34x = 335,037,249.83
5. Step 5: Solve for x
   x = 335,037,249.83/18,663.34
6. Step 6: Final answer
   x = 17,951.63