Finding the Fourth Proportional to 123,372.28, 170,075.46 and 80,857

Step by Step Solution

1. Step 1: Write the proportion equation
   123,372.28 : 170,075.46 = 80,857 : x
2. Step 2: Convert to fraction form
   123,372.28/170,075.46 = 80,857/x
3. Step 3: Cross multiply
   123,372.28x = 170,075.46 × 80,857
4. Step 4: Simplify right side
   123,372.28x = 13,751,791,469.22
5. Step 5: Solve for x
   x = 13,751,791,469.22/123,372.28
6. Step 6: Final answer
   x = 111,465.81