Finding the Third Proportional to 128.32 and 192.59

Step by Step Solution

1. Step 1: Write the proportion equation
   128.32 : 192.59 = 192.59 : x
2. Step 2: Convert to fraction form
   128.32/192.59 = 192.59/x
3. Step 3: Cross multiply
   128.32x = 192.59 × 192.59
4. Step 4: Simplify right side
   128.32x = 37,089.34
5. Step 5: Solve for x
   x = 37,089.34/128.32
6. Step 6: Final answer
   x = 289.04