Finding the Fourth Proportional to 99.62, 149.33 and 89.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99.62 : 149.33 = 89.50 : x
2. Step 2: Convert to fraction form
   99.62/149.33 = 89.50/x
3. Step 3: Cross multiply
   99.62x = 149.33 × 89.50
4. Step 4: Simplify right side
   99.62x = 13,363.84
5. Step 5: Solve for x
   x = 13,363.84/99.62
6. Step 6: Final answer
   x = 134.15