Finding the Fourth Proportional to 123,442.56, 170,288.64 and 80,995.20

Step by Step Solution

1. Step 1: Write the proportion equation
   123,442.56 : 170,288.64 = 80,995.20 : x
2. Step 2: Convert to fraction form
   123,442.56/170,288.64 = 80,995.20/x
3. Step 3: Cross multiply
   123,442.56x = 170,288.64 × 80,995.20
4. Step 4: Simplify right side
   123,442.56x = 13,792,562,454.53
5. Step 5: Solve for x
   x = 13,792,562,454.53/123,442.56
6. Step 6: Final answer
   x = 111,732.63