Finding the Fourth Proportional to 100.50, 150.69 and 88.50

Step by Step Solution

1. Step 1: Write the proportion equation
   100.50 : 150.69 = 88.50 : x
2. Step 2: Convert to fraction form
   100.50/150.69 = 88.50/x
3. Step 3: Cross multiply
   100.50x = 150.69 × 88.50
4. Step 4: Simplify right side
   100.50x = 13,336.07
5. Step 5: Solve for x
   x = 13,336.07/100.50
6. Step 6: Final answer
   x = 132.70