Finding the Fourth Proportional to 42,956.50, 59,305.89 and 28,078.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,956.50 : 59,305.89 = 28,078.42 : x
2. Step 2: Convert to fraction form
   42,956.50/59,305.89 = 28,078.42/x
3. Step 3: Cross multiply
   42,956.50x = 59,305.89 × 28,078.42
4. Step 4: Simplify right side
   42,956.50x = 1,665,215,687.89
5. Step 5: Solve for x
   x = 1,665,215,687.89/42,956.50
6. Step 6: Final answer
   x = 38,765.16