Finding the Fourth Proportional to 23,825.89, 32,878.26 and 13,215.31

Step by Step Solution

1. Step 1: Write the proportion equation
   23,825.89 : 32,878.26 = 13,215.31 : x
2. Step 2: Convert to fraction form
   23,825.89/32,878.26 = 13,215.31/x
3. Step 3: Cross multiply
   23,825.89x = 32,878.26 × 13,215.31
4. Step 4: Simplify right side
   23,825.89x = 434,496,398.16
5. Step 5: Solve for x
   x = 434,496,398.16/23,825.89
6. Step 6: Final answer
   x = 18,236.31