Finding the Fourth Proportional to 139.37, 191.69 and 114.29

Step by Step Solution

1. Step 1: Write the proportion equation
   139.37 : 191.69 = 114.29 : x
2. Step 2: Convert to fraction form
   139.37/191.69 = 114.29/x
3. Step 3: Cross multiply
   139.37x = 191.69 × 114.29
4. Step 4: Simplify right side
   139.37x = 21,907.68
5. Step 5: Solve for x
   x = 21,907.68/139.37
6. Step 6: Final answer
   x = 157.20