Finding the Fourth Proportional to 111,615, 167,280.12 and 52,320.03

Step by Step Solution

1. Step 1: Write the proportion equation
   111,615 : 167,280.12 = 52,320.03 : x
2. Step 2: Convert to fraction form
   111,615/167,280.12 = 52,320.03/x
3. Step 3: Cross multiply
   111,615x = 167,280.12 × 52,320.03
4. Step 4: Simplify right side
   111,615x = 8,752,100,896.80
5. Step 5: Solve for x
   x = 8,752,100,896.80/111,615
6. Step 6: Final answer
   x = 78,413.30