Finding the Fourth Proportional to 128.50, 192.69 and 41.82

Step by Step Solution

1. Step 1: Write the proportion equation
   128.50 : 192.69 = 41.82 : x
2. Step 2: Convert to fraction form
   128.50/192.69 = 41.82/x
3. Step 3: Cross multiply
   128.50x = 192.69 × 41.82
4. Step 4: Simplify right side
   128.50x = 8,058.30
5. Step 5: Solve for x
   x = 8,058.30/128.50
6. Step 6: Final answer
   x = 62.71