Finding the Fourth Proportional to 31,866.42, 43,973.94 and 18,437.89

Step by Step Solution

1. Step 1: Write the proportion equation
   31,866.42 : 43,973.94 = 18,437.89 : x
2. Step 2: Convert to fraction form
   31,866.42/43,973.94 = 18,437.89/x
3. Step 3: Cross multiply
   31,866.42x = 43,973.94 × 18,437.89
4. Step 4: Simplify right side
   31,866.42x = 810,786,668.59
5. Step 5: Solve for x
   x = 810,786,668.59/31,866.42
6. Step 6: Final answer
   x = 25,443.29