Finding the Fourth Proportional to 130.72, 196.16 and 89.62

Step by Step Solution

1. Step 1: Write the proportion equation
   130.72 : 196.16 = 89.62 : x
2. Step 2: Convert to fraction form
   130.72/196.16 = 89.62/x
3. Step 3: Cross multiply
   130.72x = 196.16 × 89.62
4. Step 4: Simplify right side
   130.72x = 17,579.86
5. Step 5: Solve for x
   x = 17,579.86/130.72
6. Step 6: Final answer
   x = 134.48