Finding the Fourth Proportional to 18,215.15, 25,131.94 and 10,663.31

Step by Step Solution

1. Step 1: Write the proportion equation
   18,215.15 : 25,131.94 = 10,663.31 : x
2. Step 2: Convert to fraction form
   18,215.15/25,131.94 = 10,663.31/x
3. Step 3: Cross multiply
   18,215.15x = 25,131.94 × 10,663.31
4. Step 4: Simplify right side
   18,215.15x = 267,989,703.29
5. Step 5: Solve for x
   x = 267,989,703.29/18,215.15
6. Step 6: Final answer
   x = 14,712.47