Finding the Fourth Proportional to 123,631.05, 170,562.56 and 80,661.09

Step by Step Solution

1. Step 1: Write the proportion equation
   123,631.05 : 170,562.56 = 80,661.09 : x
2. Step 2: Convert to fraction form
   123,631.05/170,562.56 = 80,661.09/x
3. Step 3: Cross multiply
   123,631.05x = 170,562.56 × 80,661.09
4. Step 4: Simplify right side
   123,631.05x = 13,757,761,599.48
5. Step 5: Solve for x
   x = 13,757,761,599.48/123,631.05
6. Step 6: Final answer
   x = 111,280.80