Finding the Fourth Proportional to 80,789.72, 121,191.06 and 28,198.04

Step by Step Solution

1. Step 1: Write the proportion equation
   80,789.72 : 121,191.06 = 28,198.04 : x
2. Step 2: Convert to fraction form
   80,789.72/121,191.06 = 28,198.04/x
3. Step 3: Cross multiply
   80,789.72x = 121,191.06 × 28,198.04
4. Step 4: Simplify right side
   80,789.72x = 3,417,350,357.52
5. Step 5: Solve for x
   x = 3,417,350,357.52/80,789.72
6. Step 6: Final answer
   x = 42,299.32