Finding the Fourth Proportional to 74.88, 102.72 and 72.27

Step by Step Solution

1. Step 1: Write the proportion equation
   74.88 : 102.72 = 72.27 : x
2. Step 2: Convert to fraction form
   74.88/102.72 = 72.27/x
3. Step 3: Cross multiply
   74.88x = 102.72 × 72.27
4. Step 4: Simplify right side
   74.88x = 7,423.57
5. Step 5: Solve for x
   x = 7,423.57/74.88
6. Step 6: Final answer
   x = 99.14