Finding the Fourth Proportional to 127.46, 175.89 and 72.19

Step by Step Solution

1. Step 1: Write the proportion equation
   127.46 : 175.89 = 72.19 : x
2. Step 2: Convert to fraction form
   127.46/175.89 = 72.19/x
3. Step 3: Cross multiply
   127.46x = 175.89 × 72.19
4. Step 4: Simplify right side
   127.46x = 12,697.50
5. Step 5: Solve for x
   x = 12,697.50/127.46
6. Step 6: Final answer
   x = 99.62