Finding the Fourth Proportional to 127.05, 175.33 and 71.78

Step by Step Solution

1. Step 1: Write the proportion equation
   127.05 : 175.33 = 71.78 : x
2. Step 2: Convert to fraction form
   127.05/175.33 = 71.78/x
3. Step 3: Cross multiply
   127.05x = 175.33 × 71.78
4. Step 4: Simplify right side
   127.05x = 12,585.45
5. Step 5: Solve for x
   x = 12,585.45/127.05
6. Step 6: Final answer
   x = 99.06