Finding the Fourth Proportional to 31,581.43, 43,583.77 and 18,156.89

Step by Step Solution

1. Step 1: Write the proportion equation
   31,581.43 : 43,583.77 = 18,156.89 : x
2. Step 2: Convert to fraction form
   31,581.43/43,583.77 = 18,156.89/x
3. Step 3: Cross multiply
   31,581.43x = 43,583.77 × 18,156.89
4. Step 4: Simplify right side
   31,581.43x = 791,345,849.33
5. Step 5: Solve for x
   x = 791,345,849.33/31,581.43
6. Step 6: Final answer
   x = 25,057.32