Finding the Fourth Proportional to 123,288.48, 170,155.92 and 80,910.24

Step by Step Solution

1. Step 1: Write the proportion equation
   123,288.48 : 170,155.92 = 80,910.24 : x
2. Step 2: Convert to fraction form
   123,288.48/170,155.92 = 80,910.24/x
3. Step 3: Cross multiply
   123,288.48x = 170,155.92 × 80,910.24
4. Step 4: Simplify right side
   123,288.48x = 13,767,356,324.62
5. Step 5: Solve for x
   x = 13,767,356,324.62/123,288.48
6. Step 6: Final answer
   x = 111,667.82