Finding the Fourth Proportional to 127.25, 175.59 and 71.99

Step by Step Solution

1. Step 1: Write the proportion equation
   127.25 : 175.59 = 71.99 : x
2. Step 2: Convert to fraction form
   127.25/175.59 = 71.99/x
3. Step 3: Cross multiply
   127.25x = 175.59 × 71.99
4. Step 4: Simplify right side
   127.25x = 12,639.91
5. Step 5: Solve for x
   x = 12,639.91/127.25
6. Step 6: Final answer
   x = 99.34