Finding the Fourth Proportional to 127.55, 190.91 and 100.55

Step by Step Solution

1. Step 1: Write the proportion equation
   127.55 : 190.91 = 100.55 : x
2. Step 2: Convert to fraction form
   127.55/190.91 = 100.55/x
3. Step 3: Cross multiply
   127.55x = 190.91 × 100.55
4. Step 4: Simplify right side
   127.55x = 19,196.00
5. Step 5: Solve for x
   x = 19,196.00/127.55
6. Step 6: Final answer
   x = 150.50