Finding the Third Proportional to 89.12 and 130.61

Step by Step Solution

1. Step 1: Write the proportion equation
   89.12 : 130.61 = 130.61 : x
2. Step 2: Convert to fraction form
   89.12/130.61 = 130.61/x
3. Step 3: Cross multiply
   89.12x = 130.61 × 130.61
4. Step 4: Simplify right side
   89.12x = 17,057.79
5. Step 5: Solve for x
   x = 17,057.79/89.12
6. Step 6: Final answer
   x = 191.40