Finding the Fourth Proportional to 80,665.75, 111,273.33 and 48,391.78

Step by Step Solution

1. Step 1: Write the proportion equation
   80,665.75 : 111,273.33 = 48,391.78 : x
2. Step 2: Convert to fraction form
   80,665.75/111,273.33 = 48,391.78/x
3. Step 3: Cross multiply
   80,665.75x = 111,273.33 × 48,391.78
4. Step 4: Simplify right side
   80,665.75x = 5,384,714,227.04
5. Step 5: Solve for x
   x = 5,384,714,227.04/80,665.75
6. Step 6: Final answer
   x = 66,753.42