Finding the Fourth Proportional to 131.89, 181.46 and 100.62

Step by Step Solution

1. Step 1: Write the proportion equation
   131.89 : 181.46 = 100.62 : x
2. Step 2: Convert to fraction form
   131.89/181.46 = 100.62/x
3. Step 3: Cross multiply
   131.89x = 181.46 × 100.62
4. Step 4: Simplify right side
   131.89x = 18,258.51
5. Step 5: Solve for x
   x = 18,258.51/131.89
6. Step 6: Final answer
   x = 138.44