Finding the Third Proportional to 55.31 and 120.56

Step by Step Solution

1. Step 1: Write the proportion equation
   55.31 : 120.56 = 120.56 : x
2. Step 2: Convert to fraction form
   55.31/120.56 = 120.56/x
3. Step 3: Cross multiply
   55.31x = 120.56 × 120.56
4. Step 4: Simplify right side
   55.31x = 14,535.32
5. Step 5: Solve for x
   x = 14,535.32/55.31
6. Step 6: Final answer
   x = 262.79