Finding the Fourth Proportional to 127.47, 175.86 and 72.18

Step by Step Solution

1. Step 1: Write the proportion equation
   127.47 : 175.86 = 72.18 : x
2. Step 2: Convert to fraction form
   127.47/175.86 = 72.18/x
3. Step 3: Cross multiply
   127.47x = 175.86 × 72.18
4. Step 4: Simplify right side
   127.47x = 12,693.57
5. Step 5: Solve for x
   x = 12,693.57/127.47
6. Step 6: Final answer
   x = 99.58