Finding the Fourth Proportional to 110.69, 152.78 and 71.88

Step by Step Solution

1. Step 1: Write the proportion equation
   110.69 : 152.78 = 71.88 : x
2. Step 2: Convert to fraction form
   110.69/152.78 = 71.88/x
3. Step 3: Cross multiply
   110.69x = 152.78 × 71.88
4. Step 4: Simplify right side
   110.69x = 10,981.83
5. Step 5: Solve for x
   x = 10,981.83/110.69
6. Step 6: Final answer
   x = 99.21