Finding the Fourth Proportional to 139.04, 191.82 and 92.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139.04 : 191.82 = 92.42 : x
2. Step 2: Convert to fraction form
   139.04/191.82 = 92.42/x
3. Step 3: Cross multiply
   139.04x = 191.82 × 92.42
4. Step 4: Simplify right side
   139.04x = 17,728.00
5. Step 5: Solve for x
   x = 17,728.00/139.04
6. Step 6: Final answer
   x = 127.50