Finding the Fourth Proportional to 99.67, 149.72 and 88.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99.67 : 149.72 = 88.50 : x
2. Step 2: Convert to fraction form
   99.67/149.72 = 88.50/x
3. Step 3: Cross multiply
   99.67x = 149.72 × 88.50
4. Step 4: Simplify right side
   99.67x = 13,250.22
5. Step 5: Solve for x
   x = 13,250.22/99.67
6. Step 6: Final answer
   x = 132.94