Finding the Fourth Proportional to 42,542.82, 63,814.37 and 12,960.54

Step by Step Solution

1. Step 1: Write the proportion equation
   42,542.82 : 63,814.37 = 12,960.54 : x
2. Step 2: Convert to fraction form
   42,542.82/63,814.37 = 12,960.54/x
3. Step 3: Cross multiply
   42,542.82x = 63,814.37 × 12,960.54
4. Step 4: Simplify right side
   42,542.82x = 827,068,630.16
5. Step 5: Solve for x
   x = 827,068,630.16/42,542.82
6. Step 6: Final answer
   x = 19,440.85