Finding the Fourth Proportional to 131.23, 196.71 and 102.43

Step by Step Solution

1. Step 1: Write the proportion equation
   131.23 : 196.71 = 102.43 : x
2. Step 2: Convert to fraction form
   131.23/196.71 = 102.43/x
3. Step 3: Cross multiply
   131.23x = 196.71 × 102.43
4. Step 4: Simplify right side
   131.23x = 20,149.01
5. Step 5: Solve for x
   x = 20,149.01/131.23
6. Step 6: Final answer
   x = 153.54