Finding the Fourth Proportional to 131.00, 196.28 and 105.18

Step by Step Solution

1. Step 1: Write the proportion equation
   131.00 : 196.28 = 105.18 : x
2. Step 2: Convert to fraction form
   131.00/196.28 = 105.18/x
3. Step 3: Cross multiply
   131.00x = 196.28 × 105.18
4. Step 4: Simplify right side
   131.00x = 20,644.20
5. Step 5: Solve for x
   x = 20,644.20/131.00
6. Step 6: Final answer
   x = 157.60