Finding the Fourth Proportional to 42,757.54, 64,137.39 and 20,262.94

Step by Step Solution

1. Step 1: Write the proportion equation
   42,757.54 : 64,137.39 = 20,262.94 : x
2. Step 2: Convert to fraction form
   42,757.54/64,137.39 = 20,262.94/x
3. Step 3: Cross multiply
   42,757.54x = 64,137.39 × 20,262.94
4. Step 4: Simplify right side
   42,757.54x = 1,299,612,085.33
5. Step 5: Solve for x
   x = 1,299,612,085.33/42,757.54
6. Step 6: Final answer
   x = 30,394.92