Finding the Fourth Proportional to 80,736.87, 121,105.98 and 28,146.27

Step by Step Solution

1. Step 1: Write the proportion equation
   80,736.87 : 121,105.98 = 28,146.27 : x
2. Step 2: Convert to fraction form
   80,736.87/121,105.98 = 28,146.27/x
3. Step 3: Cross multiply
   80,736.87x = 121,105.98 × 28,146.27
4. Step 4: Simplify right side
   80,736.87x = 3,408,681,611.69
5. Step 5: Solve for x
   x = 3,408,681,611.69/80,736.87
6. Step 6: Final answer
   x = 42,219.64