Finding the Fourth Proportional to 131.34, 181.18 and 89.82

Step by Step Solution

1. Step 1: Write the proportion equation
   131.34 : 181.18 = 89.82 : x
2. Step 2: Convert to fraction form
   131.34/181.18 = 89.82/x
3. Step 3: Cross multiply
   131.34x = 181.18 × 89.82
4. Step 4: Simplify right side
   131.34x = 16,273.59
5. Step 5: Solve for x
   x = 16,273.59/131.34
6. Step 6: Final answer
   x = 123.90