Finding the Fourth Proportional to 127.16, 191.42 and 91.34

Step by Step Solution

1. Step 1: Write the proportion equation
   127.16 : 191.42 = 91.34 : x
2. Step 2: Convert to fraction form
   127.16/191.42 = 91.34/x
3. Step 3: Cross multiply
   127.16x = 191.42 × 91.34
4. Step 4: Simplify right side
   127.16x = 17,482.89
5. Step 5: Solve for x
   x = 17,482.89/127.16
6. Step 6: Final answer
   x = 137.49