Finding the Fourth Proportional to 109,108.28, 150,643.56 and 80,431.25

Step by Step Solution

1. Step 1: Write the proportion equation
   109,108.28 : 150,643.56 = 80,431.25 : x
2. Step 2: Convert to fraction form
   109,108.28/150,643.56 = 80,431.25/x
3. Step 3: Cross multiply
   109,108.28x = 150,643.56 × 80,431.25
4. Step 4: Simplify right side
   109,108.28x = 12,116,449,383.65
5. Step 5: Solve for x
   x = 12,116,449,383.65/109,108.28
6. Step 6: Final answer
   x = 111,049.77