Finding the Fourth Proportional to 123,353.25, 170,259.39 and 80,439.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,353.25 : 170,259.39 = 80,439.72 : x
2. Step 2: Convert to fraction form
   123,353.25/170,259.39 = 80,439.72/x
3. Step 3: Cross multiply
   123,353.25x = 170,259.39 × 80,439.72
4. Step 4: Simplify right side
   123,353.25x = 13,695,617,658.97
5. Step 5: Solve for x
   x = 13,695,617,658.97/123,353.25
6. Step 6: Final answer
   x = 111,027.62