Finding the Fourth Proportional to 127.37, 175.72 and 72.09

Step by Step Solution

1. Step 1: Write the proportion equation
   127.37 : 175.72 = 72.09 : x
2. Step 2: Convert to fraction form
   127.37/175.72 = 72.09/x
3. Step 3: Cross multiply
   127.37x = 175.72 × 72.09
4. Step 4: Simplify right side
   127.37x = 12,667.65
5. Step 5: Solve for x
   x = 12,667.65/127.37
6. Step 6: Final answer
   x = 99.46