Finding the Fourth Proportional to 131.01, 196.20 and 100.35

Step by Step Solution

1. Step 1: Write the proportion equation
   131.01 : 196.20 = 100.35 : x
2. Step 2: Convert to fraction form
   131.01/196.20 = 100.35/x
3. Step 3: Cross multiply
   131.01x = 196.20 × 100.35
4. Step 4: Simplify right side
   131.01x = 19,688.67
5. Step 5: Solve for x
   x = 19,688.67/131.01
6. Step 6: Final answer
   x = 150.28