Finding the Fourth Proportional to 111,399.69, 167,109.40 and 31,438.37

Step by Step Solution

1. Step 1: Write the proportion equation
   111,399.69 : 167,109.40 = 31,438.37 : x
2. Step 2: Convert to fraction form
   111,399.69/167,109.40 = 31,438.37/x
3. Step 3: Cross multiply
   111,399.69x = 167,109.40 × 31,438.37
4. Step 4: Simplify right side
   111,399.69x = 5,253,647,147.68
5. Step 5: Solve for x
   x = 5,253,647,147.68/111,399.69
6. Step 6: Final answer
   x = 47,160.34