Finding the Fourth Proportional to 80,991.11, 111,780.03 and 49,153.86

Step by Step Solution

1. Step 1: Write the proportion equation
   80,991.11 : 111,780.03 = 49,153.86 : x
2. Step 2: Convert to fraction form
   80,991.11/111,780.03 = 49,153.86/x
3. Step 3: Cross multiply
   80,991.11x = 111,780.03 × 49,153.86
4. Step 4: Simplify right side
   80,991.11x = 5,494,419,945.42
5. Step 5: Solve for x
   x = 5,494,419,945.42/80,991.11
6. Step 6: Final answer
   x = 67,839.79