Finding the Fourth Proportional to 85,436.89, 117,879.23 and 49,136.36

Step by Step Solution

1. Step 1: Write the proportion equation
   85,436.89 : 117,879.23 = 49,136.36 : x
2. Step 2: Convert to fraction form
   85,436.89/117,879.23 = 49,136.36/x
3. Step 3: Cross multiply
   85,436.89x = 117,879.23 × 49,136.36
4. Step 4: Simplify right side
   85,436.89x = 5,792,155,815.25
5. Step 5: Solve for x
   x = 5,792,155,815.25/85,436.89
6. Step 6: Final answer
   x = 67,794.56