Finding the Fourth Proportional to 123,578.89, 170,544.56 and 69,866.17

Step by Step Solution

1. Step 1: Write the proportion equation
   123,578.89 : 170,544.56 = 69,866.17 : x
2. Step 2: Convert to fraction form
   123,578.89/170,544.56 = 69,866.17/x
3. Step 3: Cross multiply
   123,578.89x = 170,544.56 × 69,866.17
4. Step 4: Simplify right side
   123,578.89x = 11,915,295,221.54
5. Step 5: Solve for x
   x = 11,915,295,221.54/123,578.89
6. Step 6: Final answer
   x = 96,418.53