Finding the Fourth Proportional to 139.59, 192.71 and 92.95

Step by Step Solution

1. Step 1: Write the proportion equation
   139.59 : 192.71 = 92.95 : x
2. Step 2: Convert to fraction form
   139.59/192.71 = 92.95/x
3. Step 3: Cross multiply
   139.59x = 192.71 × 92.95
4. Step 4: Simplify right side
   139.59x = 17,912.15
5. Step 5: Solve for x
   x = 17,912.15/139.59
6. Step 6: Final answer
   x = 128.32