Finding the Fourth Proportional to 139.24, 192.06 and 92.59

Step by Step Solution

1. Step 1: Write the proportion equation
   139.24 : 192.06 = 92.59 : x
2. Step 2: Convert to fraction form
   139.24/192.06 = 92.59/x
3. Step 3: Cross multiply
   139.24x = 192.06 × 92.59
4. Step 4: Simplify right side
   139.24x = 17,783.31
5. Step 5: Solve for x
   x = 17,783.31/139.24
6. Step 6: Final answer
   x = 127.71