Finding the Fourth Proportional to 127.55, 175.99 and 72.29

Step by Step Solution

1. Step 1: Write the proportion equation
   127.55 : 175.99 = 72.29 : x
2. Step 2: Convert to fraction form
   127.55/175.99 = 72.29/x
3. Step 3: Cross multiply
   127.55x = 175.99 × 72.29
4. Step 4: Simplify right side
   127.55x = 12,722.32
5. Step 5: Solve for x
   x = 12,722.32/127.55
6. Step 6: Final answer
   x = 99.74