Finding the Fourth Proportional to 127.34, 191.15 and 103.58

Step by Step Solution

1. Step 1: Write the proportion equation
   127.34 : 191.15 = 103.58 : x
2. Step 2: Convert to fraction form
   127.34/191.15 = 103.58/x
3. Step 3: Cross multiply
   127.34x = 191.15 × 103.58
4. Step 4: Simplify right side
   127.34x = 19,799.32
5. Step 5: Solve for x
   x = 19,799.32/127.34
6. Step 6: Final answer
   x = 155.48