Finding the Fourth Proportional to 28,072.80, 42,108.84 and 8,082.78

Step by Step Solution

1. Step 1: Write the proportion equation
   28,072.80 : 42,108.84 = 8,082.78 : x
2. Step 2: Convert to fraction form
   28,072.80/42,108.84 = 8,082.78/x
3. Step 3: Cross multiply
   28,072.80x = 42,108.84 × 8,082.78
4. Step 4: Simplify right side
   28,072.80x = 340,356,489.78
5. Step 5: Solve for x
   x = 340,356,489.78/28,072.80
6. Step 6: Final answer
   x = 12,124.07