Finding the Fourth Proportional to 80,859.52, 121,306.56 and 28,270.72

Step by Step Solution

1. Step 1: Write the proportion equation
   80,859.52 : 121,306.56 = 28,270.72 : x
2. Step 2: Convert to fraction form
   80,859.52/121,306.56 = 28,270.72/x
3. Step 3: Cross multiply
   80,859.52x = 121,306.56 × 28,270.72
4. Step 4: Simplify right side
   80,859.52x = 3,429,423,791.92
5. Step 5: Solve for x
   x = 3,429,423,791.92/80,859.52
6. Step 6: Final answer
   x = 42,412.12