Finding the Fourth Proportional to 139.25, 192.17 and 92.69

Step by Step Solution

1. Step 1: Write the proportion equation
   139.25 : 192.17 = 92.69 : x
2. Step 2: Convert to fraction form
   139.25/192.17 = 92.69/x
3. Step 3: Cross multiply
   139.25x = 192.17 × 92.69
4. Step 4: Simplify right side
   139.25x = 17,811.51
5. Step 5: Solve for x
   x = 17,811.51/139.25
6. Step 6: Final answer
   x = 127.91