Finding the Fourth Proportional to 80,724.87, 121,087.98 and 28,134.27

Step by Step Solution

1. Step 1: Write the proportion equation
   80,724.87 : 121,087.98 = 28,134.27 : x
2. Step 2: Convert to fraction form
   80,724.87/121,087.98 = 28,134.27/x
3. Step 3: Cross multiply
   80,724.87x = 121,087.98 × 28,134.27
4. Step 4: Simplify right side
   80,724.87x = 3,406,721,923.07
5. Step 5: Solve for x
   x = 3,406,721,923.07/80,724.87
6. Step 6: Final answer
   x = 42,201.64