Finding the Fourth Proportional to 31,729.39, 43,796.18 and 18,309.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,729.39 : 43,796.18 = 18,309.42 : x
2. Step 2: Convert to fraction form
   31,729.39/43,796.18 = 18,309.42/x
3. Step 3: Cross multiply
   31,729.39x = 43,796.18 × 18,309.42
4. Step 4: Simplify right side
   31,729.39x = 801,882,699.79
5. Step 5: Solve for x
   x = 801,882,699.79/31,729.39
6. Step 6: Final answer
   x = 25,272.56