Finding the Third Proportional to 128.95 and 265.37

Step by Step Solution

1. Step 1: Write the proportion equation
   128.95 : 265.37 = 265.37 : x
2. Step 2: Convert to fraction form
   128.95/265.37 = 265.37/x
3. Step 3: Cross multiply
   128.95x = 265.37 × 265.37
4. Step 4: Simplify right side
   128.95x = 70,419.10
5. Step 5: Solve for x
   x = 70,419.10/128.95
6. Step 6: Final answer
   x = 546.12