Finding the Fourth Proportional to 139.96, 192.89 and 116.65

Step by Step Solution

1. Step 1: Write the proportion equation
   139.96 : 192.89 = 116.65 : x
2. Step 2: Convert to fraction form
   139.96/192.89 = 116.65/x
3. Step 3: Cross multiply
   139.96x = 192.89 × 116.65
4. Step 4: Simplify right side
   139.96x = 22,499.07
5. Step 5: Solve for x
   x = 22,499.07/139.96
6. Step 6: Final answer
   x = 160.76