Finding the Fourth Proportional to 80,961.12, 111,739.91 and 49,151.21

Step by Step Solution

1. Step 1: Write the proportion equation
   80,961.12 : 111,739.91 = 49,151.21 : x
2. Step 2: Convert to fraction form
   80,961.12/111,739.91 = 49,151.21/x
3. Step 3: Cross multiply
   80,961.12x = 111,739.91 × 49,151.21
4. Step 4: Simplify right side
   80,961.12x = 5,492,150,977.34
5. Step 5: Solve for x
   x = 5,492,150,977.34/80,961.12
6. Step 6: Final answer
   x = 67,836.89