Finding the Fourth Proportional to 127.32, 175.72 and 72.07

Step by Step Solution

1. Step 1: Write the proportion equation
   127.32 : 175.72 = 72.07 : x
2. Step 2: Convert to fraction form
   127.32/175.72 = 72.07/x
3. Step 3: Cross multiply
   127.32x = 175.72 × 72.07
4. Step 4: Simplify right side
   127.32x = 12,664.14
5. Step 5: Solve for x
   x = 12,664.14/127.32
6. Step 6: Final answer
   x = 99.47