Finding the Fourth Proportional to 111,786.24, 167,789.52 and 82,120.80

Step by Step Solution

1. Step 1: Write the proportion equation
   111,786.24 : 167,789.52 = 82,120.80 : x
2. Step 2: Convert to fraction form
   111,786.24/167,789.52 = 82,120.80/x
3. Step 3: Cross multiply
   111,786.24x = 167,789.52 × 82,120.80
4. Step 4: Simplify right side
   111,786.24x = 13,779,009,614.02
5. Step 5: Solve for x
   x = 13,779,009,614.02/111,786.24
6. Step 6: Final answer
   x = 123,262.13