Finding the Fourth Proportional to 139.37, 192.18 and 92.69

Step by Step Solution

1. Step 1: Write the proportion equation
   139.37 : 192.18 = 92.69 : x
2. Step 2: Convert to fraction form
   139.37/192.18 = 92.69/x
3. Step 3: Cross multiply
   139.37x = 192.18 × 92.69
4. Step 4: Simplify right side
   139.37x = 17,813.27
5. Step 5: Solve for x
   x = 17,813.27/139.37
6. Step 6: Final answer
   x = 127.82