Finding the Fourth Proportional to 111,107.42, 166,631.40 and 31,140.91

Step by Step Solution

1. Step 1: Write the proportion equation
   111,107.42 : 166,631.40 = 31,140.91 : x
2. Step 2: Convert to fraction form
   111,107.42/166,631.40 = 31,140.91/x
3. Step 3: Cross multiply
   111,107.42x = 166,631.40 × 31,140.91
4. Step 4: Simplify right side
   111,107.42x = 5,189,052,789.15
5. Step 5: Solve for x
   x = 5,189,052,789.15/111,107.42
6. Step 6: Final answer
   x = 46,703.03