Finding the Fourth Proportional to 31,578.49, 43,581.54 and 18,150.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,578.49 : 43,581.54 = 18,150.31 : x
2. Step 2: Convert to fraction form
   31,578.49/43,581.54 = 18,150.31/x
3. Step 3: Cross multiply
   31,578.49x = 43,581.54 × 18,150.31
4. Step 4: Simplify right side
   31,578.49x = 791,018,583.82
5. Step 5: Solve for x
   x = 791,018,583.82/31,578.49
6. Step 6: Final answer
   x = 25,049.28