Finding the Fourth Proportional to 30,872.27, 42,577.04 and 20,113.10

Step by Step Solution

1. Step 1: Write the proportion equation
   30,872.27 : 42,577.04 = 20,113.10 : x
2. Step 2: Convert to fraction form
   30,872.27/42,577.04 = 20,113.10/x
3. Step 3: Cross multiply
   30,872.27x = 42,577.04 × 20,113.10
4. Step 4: Simplify right side
   30,872.27x = 856,355,949.77
5. Step 5: Solve for x
   x = 856,355,949.77/30,872.27
6. Step 6: Final answer
   x = 27,738.68