Finding the Fourth Proportional to 111,078.81, 166,621.40 and 43,608.05

Step by Step Solution

1. Step 1: Write the proportion equation
   111,078.81 : 166,621.40 = 43,608.05 : x
2. Step 2: Convert to fraction form
   111,078.81/166,621.40 = 43,608.05/x
3. Step 3: Cross multiply
   111,078.81x = 166,621.40 × 43,608.05
4. Step 4: Simplify right side
   111,078.81x = 7,266,033,291.12
5. Step 5: Solve for x
   x = 7,266,033,291.12/111,078.81
6. Step 6: Final answer
   x = 65,413.32