Finding the Fourth Proportional to 131.50, 181.27 and 89.98

Step by Step Solution

1. Step 1: Write the proportion equation
   131.50 : 181.27 = 89.98 : x
2. Step 2: Convert to fraction form
   131.50/181.27 = 89.98/x
3. Step 3: Cross multiply
   131.50x = 181.27 × 89.98
4. Step 4: Simplify right side
   131.50x = 16,311.35
5. Step 5: Solve for x
   x = 16,311.35/131.50
6. Step 6: Final answer
   x = 124.05