Finding the Fourth Proportional to 127.31, 190.50 and 92.69

Step by Step Solution

1. Step 1: Write the proportion equation
   127.31 : 190.50 = 92.69 : x
2. Step 2: Convert to fraction form
   127.31/190.50 = 92.69/x
3. Step 3: Cross multiply
   127.31x = 190.50 × 92.69
4. Step 4: Simplify right side
   127.31x = 17,657.45
5. Step 5: Solve for x
   x = 17,657.45/127.31
6. Step 6: Final answer
   x = 138.70