Finding the Fourth Proportional to 80,748.69, 121,121.96 and 28,158

Step by Step Solution

1. Step 1: Write the proportion equation
   80,748.69 : 121,121.96 = 28,158 : x
2. Step 2: Convert to fraction form
   80,748.69/121,121.96 = 28,158/x
3. Step 3: Cross multiply
   80,748.69x = 121,121.96 × 28,158
4. Step 4: Simplify right side
   80,748.69x = 3,410,552,008.89
5. Step 5: Solve for x
   x = 3,410,552,008.89/80,748.69
6. Step 6: Final answer
   x = 42,236.62