Finding the Fourth Proportional to 30,768.24, 42,535.56 and 30,487.44

Step by Step Solution

1. Step 1: Write the proportion equation
   30,768.24 : 42,535.56 = 30,487.44 : x
2. Step 2: Convert to fraction form
   30,768.24/42,535.56 = 30,487.44/x
3. Step 3: Cross multiply
   30,768.24x = 42,535.56 × 30,487.44
4. Step 4: Simplify right side
   30,768.24x = 1,296,800,333.37
5. Step 5: Solve for x
   x = 1,296,800,333.37/30,768.24
6. Step 6: Final answer
   x = 42,147.37