Finding the Fourth Proportional to 127.34, 190.83 and 91.19

Step by Step Solution

1. Step 1: Write the proportion equation
   127.34 : 190.83 = 91.19 : x
2. Step 2: Convert to fraction form
   127.34/190.83 = 91.19/x
3. Step 3: Cross multiply
   127.34x = 190.83 × 91.19
4. Step 4: Simplify right side
   127.34x = 17,400.83
5. Step 5: Solve for x
   x = 17,400.83/127.34
6. Step 6: Final answer
   x = 136.65